posted
Gavin and Roger, interesting points you bring up... I'll have to get back to ya. I work directly with the factory in Holland, test driving and developing certain products. My understanding was that the products in the states were the same now as here in europe, but I could be wrong about that... As far as your voc compliances go, things are getting quite strict here also. For example the use of hvlp pistols, and H20 base coat are much more prevelent here in Sweden than in the states. I tested one of the first H20 2k clears already in '94 (not sikkens).
Since AKZO (Sikkens) was the parent company for Chromatic before it was sold to 1Shot, I attended many company seminars about all products they manufacture. They do not use silicone in their products due to adhesion issues for multiple coating. Parafin oils are compatible with most alkyd enamels which is why I always reccomend their use as a brush oil. Parafin waxes were used in pre-1960 spar floor varnishes to enhance the top gloss and compatability with subsequent wax applicaitons. The tail solvent which floats on the top of the 1shot enamel should be thoroughly mixed back in to the paint. It is primarily a flow agent and carrier which is a significant component for ease of application and can retard the drying if too much is in that which is applied. The use of mieral spirits can often add top oil to the mix which will strongly retard dry time. Baby powder contains a trace amount of baby oil (mineral oil) and zinc oxide, both of which will retard drying of paint. Note that you may have three additional retarders added to this mix. While rapid prep is a valid cleaning agent, some surface contaminants which are a result of the outgassing properties generated durng the cure process of two component urethane coatings must be removed using a strong solvent. We have always had the best results with high-temp reducer as it drys slowly enough to continue to cut through the contaminants so they can be wiped away before they are redeposited as the solvent dries. When a clear coat has been applied, one should test a small area for adhesion by wiping on enamel and wiping it off to a thin layer. This will dry in a few minutes and can be tested for adhesion with the fingernail or magic mending tape applied over it. If it still lifts, then the surface must be physically abraided using any number of preparations from bon ami to scothchbrite pads to sandpaper. Paint relies upon a physical bond to the surface, not a chemical bond so there must be tooth to the surface. Many paints and primers have enough tooth to their surface naturally but some of the more sophisticated gloss products such as the clear top coats are so smooth that nothing will adhere to them.
Just a few points to ponder.
Posts: 1025 | From: Estes Park, CO | Registered: Nov 1998
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My best guess of why the paint scratched off so easily is the humidity factor. The second coat of paint dried much quicker. So I think it felt dry, but was not cured.
Now a funny side point, a bird had **** all over the top of the cab, and I had to scrub very hard to get that off. So why does bird **** stick better than paint? I didn't even prep that part of the turck!
posted
I agree Monte, this has been a fun and informative one even if we didn't pin down the problem.
Dave, I've gotta say in all my years in the business I've never seen anyone lay under the truck to letter it Get a bar stool top, the kind with a back. You can sit two inches off the floor, have great back support and easily work at 10 to 12 inches off the ground.
-------------------- George Perkins Millington,TN. goatwell@bigriver.net
"I started out with nothing and still have most of it left"
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Well....since i got 6 emails as a result of my response here telling me i was know it all,a liar and full of it.....gee too bad you feel that way...when i respond to a post to like this it comes from exp and knowledge and the fact that i feel i have something to offer coming from the automotive end,which is a completely diff technology than the sign end....i posted based on things i've seen with my own eyes and experienced,i did not post to ridicule,demean,or be mean spirited to draper,ray,sikkens,dupont,kent smith,the eurpoean way of life,mickey mouse,mom or apple pie...how that was read into anything i said beats me,but funny noone who posted here seemed to have a problem with it,i wasnt trying to be "right",just presenting an opinion and a possible solution to the problem like everyone else.Remember...opinions vary and are sometimes wrong,thats the reason boards like this exist.
PS..ray...would love to hear sometime about the waterbase products from over there,up til now,all of em regardless of brand pretty much bite,and thats not a big secret,the only one worth a damn seems to be waterborne primers used as a sealer
-------------------- Gavin Chachere Plotter in the garage,New Orleans La.
"Sgts Shugart and Gordon again request permission to rope down to crash site two"
Posts: 1223 | From: new orleans.la. | Registered: Mar 2000
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posted
Going along with what George said Dave, I built this little bench that sits about 6 or 8 inches off the ground. A piece of plywood and some two by fours with padding on top. I've used that thing for 15 years now and it gets me just the right height off the ground for lettering the bottom of truck doors. Don't ya get neck strain doing that way?
-------------------- Maker of fine signs and other creative stuff. Located at 109 N. Cumberland ave. Harlan, Ky. 40831 606-837-0242 Posts: 4172 | From: Ages-Brookside, Ky. Up the Holler... | Registered: Jul 1999
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posted
Hey Roger, Now is the time for you to come to the aid of all mankind(letteringkind) a new product idea for you.
Dateline Maui, Hawaii Roger announces a new product:
Rapid Prep II
This product will solve any adhesion problem you ever had in life. It will remove humidity from the air in your shop to increase drying time. This product comes with its own sterile rags for wiping down the surface. It will even clean up bird Poop. Heck it will even cause paint to stick to liquid silicone.
Sign painters were heard at a recent splatter jam in Alabama saying that this stuff was so good they couldnt get their hands on it.
One sign painter said, "Its so powerful, the taliban is afriad it may rub them out."
DISCLAIMER TIME!
This was meant as a joke and not meant to offend anyone dead or undead.
I am curious to see the final prognosis of what went wrong and what was done to cure it. so far it sounds like its working out. If nothing else its been an educational string for me to see peoples opinion and ideas on how they would deal with such a nightmare of a problem. I hope I never experience such a dillemma.
Posts: 1739 | From: Trenton, NJ, USA | Registered: Jun 2001
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Im sure that the double coat is going to save my butt on this job. I'm leaning towards a triple coat of white.
Its now Saturday, and it is raining again! Since when did Illinois become a rain forrest? It has been raining on and off all week.
Now as for laying under the truck.....
I grew up watching guys paint this way. They did use an automotive floor creepers sometimes, and I realize now it would have been a smart idea.
Vinyl really spoils a guy, ya know. You take for granted how easy it is to slap letters on a surface in a hard to get to area on a truck. After 14 years of vinyl work, I can still hand paint, but I really have forgotten a lot of little time saving tricks.
While doing this job, I kept remembering those little tricks AFTER the task was completed!
I'll post a picture on MOnday or Tuesday when the truck is finished. Maybe the sun will be out by then.
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Hahahahaha......don'tcha love it when someone with all of 3 or 4 years experience, has to Email ya and say "yer full of it! My freind told me how it really is!"
Gavin...when I get those Emails....I just laugh and think "OK do it the way yer freind said! I'll read yer post on the BB crying about yer problem!"
-------------------- Si Allen #562 La Mirada, CA. USA
(714) 521-4810
si.allen on Skype
siallen@dslextreme.com
"SignPainters do It with Longer Strokes!"
Never mess with your profile while in a drunken stupor!!!
Brushasaurus on Chat
Posts: 8831 | From: La Mirada, CA, USA | Registered: Nov 1998
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The paint/prep angles have been pretty much covered, so I wont add to them. With the truck, a floor jack under the frame on the side you are working on works well, or two short ramps on the same side, assuming they will fit without crunching bodywork. If you are still too high with a stool, throw down a piece of cardboard.
The sit-down angle-- if you can find one, an old wooden soft drink box-- the 24 bottle kind-- works as a 3 height stool. It is just a little narrow, and will once in a while tip over backwards, but then who ever said sitting down was easy?! Drawback with these is that the corners will start to loosen up after a while. I just cut some MDO to fit the open side and fastened around the edges. No more loose corners, but it didn't cure the tipping over.
These old boxes also work real well for gaining a couple inches of height when a step ladder is too much, or not available.
-------------------- Bill Preston Fly Creek, N.Y. USA
Posts: 943 | From: Fly Creek, N.Y. USA | Registered: Jan 2000
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posted
Wild Time In The Wild West- A great time was had by all at this years Gold Rush, Except for the three Outlaw Letterheads that are now wanted by the Sheriff of Deadwood. The Midcoast boys always throw a great meet. Thanks to Griz and Tim for putting up with us. And I think Tim deserves an extra Biker hug for the grief he had to put up with.
-------------------- Silver Creek Signworks Dick Bohrer Two Harbors, MN Posts: 236 | From: Two Harbors, MN USA | Registered: Jun 1999
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One of the guys I paint with did a stack of metal sign blanks with big red letters (1-Shot).
He was runnin behind and had to package them up while they were still tacky. He thought he'd be kewl and sprinkle some baby powder on the sign so the butcher paper he put between them wouldn't stick to the paint.
Lo and behold, when he got to the client and unwrapped one to show him, he lifted it up and all the paint just fell to the ground in a fine red powder.
I was reading above, and noticed you used baby powder to pounce the pattern, used graphite to redraw it and then took the baby powder back off. How did you do that? Smearing it around with a dry towel may not have removed it all and may have contributed to the problem. Just wondering.
posted
Ok, heres something new, i don't believe I saw anyone post this.
12 years ago I had a stock car to letter, customer wanted white, we were out so I ran to Napa auto parts and picked up a pint of white, went back to the shop, and lettered the race car.
Next day I get a call from the driver, he said that the paint had'nt dried yet, he even got paint on his drivers suit getting into the car.
Then on the 3rd day, only 20% of the car had dried, but the rest of the paint was still wet, the parts that were dry were scraping right off.
I then decided that it was time for a call to One-shot, after talking to them, I gave them the batch number on the bottom of the can, they responded the next day by stating that somehow a bacth that was ment to go to europe had made to our little town, apparently they said that they could'nt ship it oversea with all of the the chemicals in it that were normally in the paint.
Luckally the car was totaled that first race.
One-Shot responed by sending me a 6 pack of pints for my trouble, Thank you One-Shot for taking care of us.
I don't know if this helps but you might try calling them with the batch number.
Also, I only use comet & mineral spirits for prep. I'd be worried about using any prep fluids, my family has been making application fluid since the 60's, and have never used it for prep, to many Micro-Residues left behind, we only use it for Vinyl application.
Good Luck
-------------------- Ron Percell Percell Signs 707-769-0639 Petaluma, California
It has been 5 months since the original post-- what did you end up doing, and was the problem solved?
Also, it is interesting that this re-appeared about the same time as the post about vinyl not sticking.
FWIW-- my own method of surface prep is this -- wash first with clear water, follow with a de-waxer, wash again with comet and mostly water, then dry with chamois. Has worked well for a lot of years.
To add to the other post on vinyl problems-- have checked with local Chev/GMC dealer. Supposedly, vehicles are not being given some sort of teflon coating from the factory. If there is something of this sort, then it is an after-market dealie.
-------------------- Bill Preston Fly Creek, N.Y. USA Posts: 943 | From: Fly Creek, N.Y. USA | Registered: Jan 2000
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Hi guys! I haven't much time on the puter lately and I'm happy to see the board moving as well as usual. I didn't read every reply on this so if I repeat anyones reply, that would be a good thing huh? Here's my 2 cents... New paint (depending on the climate and application mixture at the body shop) may take months to cure. New paint gives off a gas created by the solvent in the paint mixture. These gasses are created by a laquer type solvent much harsher than the One shot base and could cause the problem. This is what it appears like to me from the pics. I've also found in the past years that using one shot reducer instead of mineral spirits creates better adhesion also. I usually use mineral spirits, let dry, then rapid tac when in question. Weather it be right or wrong.. it's what works for me. Guess I'll read the rest of the posts now and see what the others said...
-------------------- AirbrushBobby.com Clearwater, FL The message of the cross is foolishness to those who are perishing.1Cor1:18 “The wages of sin is death, but the free gift of God is eternal life in Jesus Christ our Lord”Rom6:23 Posts: 505 | From: Clearwater Florida USA | Registered: Feb 1999
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