posted
I bought a spray gun & touch-up gun from a painter who I had hired to do some work on my house. I had recently got myself a compressor & when I learned that this guy had 2 unused guns he would give me for a set of magnetics I jumped at the opportunity.
He also included a brief lesson at my shop. He had never used 1-shot, but put some in a cup & thinned it(with paint thinner) for the consistency he recommended for spraying.
The spray lesson went well & I think I will get some good use out of the guns, but when it came time for clean up, he dumped a little remaining thinned paint into my new can. I didn't say anything & then after swishing another 3 or 4 ounces of thinner around the pot to begin cleaning it he dumped this thinner in my new can also before I could stop him.
I had to coat out a panel with a roller the other day using this color, & although I was able to get it to lay down fine, but it was much more difficult.
Will leaving the can open for a few days evaporate the extra thinner?
posted
When you accidentally dump thinners into you paint , generally it should re-float to the top, and you may be able to pour most of it of the top. If you mixed the thinner into the paint then leaving the can open for a few days will evaporate some of the thinners, but not enough to get it back to its previous consistency. Option, buy another can of one shot for brush and roller painting, and leave your thinned can for spraying. If you have to coat out a panel, why not spray the panel with three light to moderate coats of the thinned enamel?
-------------------- "Are we having fun yet?" Peter Schuttinga DZines Sign Studio 1617 Millstream rd Victoria BC V9B-6G4 Posts: 521 | From: Victoria BC | Registered: Mar 2002
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posted
I did mix it in. I like the keep an extra can for spraying idea though.
As for why I don't spray the panel, maybe when I am more set-up I would try that. This 12" x 18" panel I did looks great, but the overspray kind of messed up a 2' x 5' white panel 12' away in another room, & was lining the inside of my nostrils for a few days as well (I know...respirators... what can I say, bad training) so once I get a spray room set-up & maybe some exhaust fans it would be easier. Also I can roll out a panel in less time then I could get the gun set up, so I'll probably always save spraying for really necessary jobs.
posted
doug, now that you got a compressor and spray guns...you need to move over to AUTOMOTIVE acrylic enamel. this is a great paint for backgrounds on boards and panels. will stick to metal of wood thats properly primed. the big advantage with A/E is drying time. your in the same temp zones iam in(most of the year)and i spray A/E out on the yard. and with the sun on it you got a 2 hour drying time.....also the paint goes futher then one shot when thinned. you buy a qt of A/E and it nedds to be reduced 50%. so a qt of paint will get 2 qts after reducing. also check with your auto paint store, for MISMATCH PAINT, this happen when they dont mix colors right....it may be enough off not to match job it was intended for but is good enough for a sign background.
-------------------- joe pribish-A SIGN MINT 2811 longleaf Dr. pensacola, fl 32526 850-637-1519 BEWARE THE TRUTH.....YOU MAY NOT LIKE WHAT YOU FIND Posts: 11582 | From: pensacola, fl. usa | Registered: Nov 1998
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You can also pick up a respirator at the Automotive paint supply shop too. I spent a little more for mine so I could just replace the canisters (filters).
- Brian in Everett
-------------------- Brian Diver PDQ Signs Everett, Wa
posted
you dont need a respirator for A/E normally a paper filter will do. if you add the catylist then you need a charcoal filter respirator. those icosynates will kill ya....
-------------------- joe pribish-A SIGN MINT 2811 longleaf Dr. pensacola, fl 32526 850-637-1519 BEWARE THE TRUTH.....YOU MAY NOT LIKE WHAT YOU FIND Posts: 11582 | From: pensacola, fl. usa | Registered: Nov 1998
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OP Said: "you dont need a respirator for acrylic enamel, normally a paper filter will do."
EEEEK! BAD ADVISE! Although catylized acrylic enamel is certainly worse, I do not recommend spraying anything that is solvent-based while wearing just a paper filter mask. Paper filters are only designed for particles such as dust. When spraying paint, there are micro particles and vapors that will KILL BRAIN CELLS.
Have a good day.
Bruce Deveau
-------------------- Bruce Deveau 331 Main St. Amesbury, Ma USA 01913 Posts: 139 | From: Amesbury, MA USA | Registered: Jul 2000
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posted
Doug, an HVLP gun spraying at about 15 lbs should help cure the overspray problem. and if you find yourself walking like John Wayne or worse yet, a crab, it's probably too late to get a good respirator !! Ron
-------------------- Ron Costa Sign and Design 28 Ingerson Road Jefferson, NH 0358 Posts: 620 | From: New Hampshire | Registered: Oct 2002
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posted
I agree with Doug, paper filters are for dusts only. As an industrial painter in my former life I have sprayed about every liquid known to man, and there is nothing safe about any of them, so at a minimum use a respirator with charcoal cartridges especially made for spray painting, and in addition use a pre-filter(paper cone). As far as catalized paints, such as the automotive paints, the catalist is generally of the isocyanite family, which no respirator cartridge can protect you from. Hence you need to wear an airfed mask/hood when using these products. Isocyanites are very nasty, and you can become very sensitized to them due to repeated exposures, to the point where you will react very strongly to the presence of such a product. This is a life time condition, no fun, and will force a career switch. I have a spray set-up in my shop, and was going through a few cartridges, which are around $15 per set, which really adds up over time. I bought a airfed set-up which uses an ambient air pump to supply air from the outside to a full face mask. Total cost was around $1300, but well worth it as I'm now fully protected against all the nasties, and dont have to shell out $ for cartridges, which are only good for 8 hours max.
-------------------- "Are we having fun yet?" Peter Schuttinga DZines Sign Studio 1617 Millstream rd Victoria BC V9B-6G4 Posts: 521 | From: Victoria BC | Registered: Mar 2002
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posted
i also said.."i spray paint in the yard", not in an inclosed building....i agree with all about a good respirator....but when i spray out in the open, i stay upwind from any over spray.....and the paper mask filter works just fine. i can attest to isocynate poisoning.....not a fun thing and iam lucky. i painted the bathtub in the house when A/E with catalyst 1st came out. used a paper mask, had a fan in the bathroom window and sprayed the tub with my detail gun rather then the dilvbus. I think thats the only reason i didnt get it worse then i did. i was ok for a couple hours...the n it hit me was like a truck sittin on my chest couldnt get any air, i could breath but was gettin very little oxygen and chest hurt....i sat in a chair for 4-5 hours....till the pain went away......and was able to brath fairly well...for the next couple months i was very short of breath.
-------------------- joe pribish-A SIGN MINT 2811 longleaf Dr. pensacola, fl 32526 850-637-1519 BEWARE THE TRUTH.....YOU MAY NOT LIKE WHAT YOU FIND Posts: 11582 | From: pensacola, fl. usa | Registered: Nov 1998
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posted
Doug, yup listen to Peter and Bruce, I don't know all the terminology of automotive paint, but I did sort of like OP, except I was in my truck port 20'x 24'x 14' I had bought a new truck at the time and I wanted my side tool boxes to match, so I bought automotive paint to match the truck. I had a paper mask. I learned from that incident. I lost my taste buds!" You can't imagine what it's like to loose the flavor of anything you eat, even 7-up tasted like muddy water. I finally went to the doctor, his advice was drinking lot of fluids and water to flush it out of your system. Be careful or get a super high packed respirator when painting with automitive paints.
-------------------- aka:Cisco the "Traveling Millennium Sign Artist" http://www.franciscovargas.com Fresno, CA 93703 559 252-0935 "to live life, is to love life, a sign of no life, is a sign of no love"...Cisco 12'98 Posts: 3576 | From: Fresno, Ca, the great USA | Registered: Dec 1998
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posted
Yup, I'm definantly listening up to this topic. Spraying is cool, but I done withouit this long, so no rush. I am going to convert my screen printing darkroom (since I'm doing digital instead) into a spray booth with an exhaust system (& good respirators!) Thanks all.
posted
I used to receive lots of safety information on this subject when I was in the union formerly known as the IBPAT, International Brotherhood of Painters and Allied Trades. One brochure I have describes spraying with a "paper mask" as more dangerous than with no mask at all, due to the false sense of security that it can give. A paper mask is not a respirator and is not effective with any type paint mist. It blocks dust particles only and is not completely effective at even that. For example, I don't think it stops silica dust during sandblasting. Its proper name is "nuisance mask." I agree with the previous comment about painting with isocyanates. Filter-type respirators don't protect against them, unless thay have something new that I haven't kept up with. Only use a fresh air supplied system.
The damage done to the resperatory system, and and the central nervous system, by these chemicals is often not instantaneous, but cumulative gradually. Since no immediate risk is perceived, the danger is all the more insidious.
-------------------- Brad Ferguson See More Signs 7931 Wornall Rd Kansas City, MO 64111 signbrad@yahoo.com 816-739-7316 Posts: 1230 | From: Kansas City, MO, USA | Registered: Nov 1998
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posted
To Doug: I've often used thinned down paint as a sort of primer. just roll it on some MDO and it'll soak right in. Made very durable signs that way, too durable. I'm not refering to job security, but to bad design. I kept wishing the sign would up and die, but it stayed and stayed... As far as a good resperator goes, it is imperitive. I think my phisical abilities are somewhat limited by starting smoking at an early age. Jesus started cleaning up my act 13 years ago, that's when I quit. But the effects are still there. Working without a resperator would be like starting a three pack a day habit. At this time, I do alot of spray painting. A locomotive uses at least 5 gallons of AE, before thinning. I don't mind the cost of filters much at all. If i can get an e-image of a finished locomotive, I'm thinking of posting it as "BIG vehicl graphics". It's funny where this trade can lead. Jim.
-------------------- James Donahue Donahue Sign Arts 1851 E. Union Valley Rd. Seymour TN. (865) 577-3365 brushman@nxs.net
Democracy is two wolves and a lamb voting on what's for lunch, Benjamin Franklin Posts: 2057 | From: 1033 W. Union Valley Rd. | Registered: Feb 2003
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Our paint supplier said that the isocynates actually seals the air sacs in your lungs and it is irreversable. Not to mention, that the chemical actually transfers from one surface to another. Say you come out of your OSHA approved spray booth and sit down at the desk chair with your paint suit on, when you come back to said chair and sit down in shorts and short sleeves the isocynates that were left from the suit are now on your skin, being absorbed into your blood stream. OUCH!
Think I'll just keep rolling and brushing OneShot.
Bruce
-------------------- Bruce & Deb Newton Graphic Lettering San Marcos, CA Posts: 126 | From: San Marcos, CA | Registered: Sep 2001
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