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We really bombed out today trying to get a smooth coat of gloss latex on MDO. Tried rolling it bit it was "bumpy"; then tried spraying it but it looked like sand. Finally gave up and ordered some alkyd paint. Is it too hot (90degrees) for latex to lay out?
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Posts: 1266 | From: Jacksonville Beach, Fl. USA | Registered: Nov 1998
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I would think so. But for the life of me, I'm trying to figure out why you would want to use latex for a background on MDO when One Shot makes such a fine paint for such purposes? If its drying time you're after, with the use of One Shot's hardner you could have that panel ready for lettering paint or vinyl faster than you could with latex. Vinyl manufacturers don't recommend vinyl over latex anyway.
------------------ Dave Sherby "Sandman" SherWood Sign & Graphic Design Crystal Falls, MI 49920 906-875-6201 ICQ: 21604027 sherwood@up.net
Posts: 5397 | From: Crystal Falls, MI USA | Registered: Apr 1999
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We are trying to phase out of the alkyd paints altogether. We have been successful in the past using certain brands of latex for backgrounds with vinyl letters (in cooler temperatures). The latex does not oxidise and fade like alkyd paint does. Here if Florida an alkyd blue background facing south looks bad in a couple of years.
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Posts: 1266 | From: Jacksonville Beach, Fl. USA | Registered: Nov 1998
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There are additives available that will help to retard the drying time of latex. I think its called Floetrol. You should be able to pick them up at any Sherwin-Williams paint store. Also, if you spray latex, try thinning it with UP TO 8 ounces of water per gallon of paint. I spray latex quite often and have had no problems.
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:) Design is Everything! :) Glenn Taylor in beautiful North Carolina
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Hi Jean, for large panels, the method we use, whether latex of alkyd, is to roll out a two to three foot section then immediately smooth out the orangepeel from the roller with a 4" foam brush. Light strokes, just to knock down the bumps. Then roll out the next section and smooth it, and so on, overlapping the brush strokes a bit on each section.
If it's real hot, we would probably stop right there and settle for what we get. If its a bit cooler, or if we've added penetrol (for alkyd) or floetrol (for latex), a final round of passes with the brush over the entire length of the panel will really finish it off and give a continuous, even appearance.
For smaller panels you don't even need the roller. But still use the same strategy; cover a section at a time, smoothing out the strokes with a final session of long strokes the entire length of the panel. Back in the day, this was referred to as 'laying on' a coat of paint.
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