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| Need spray paint help. |
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| DaOld Man:
Wasnt sure where to post this. Its not arcade related or art, but I could use some advice from experienced painters on here. I changed out my back door on the house, because the frame was rotting. Put up new door (sub flooring and seal looked ok). The old door had aluminum trim around the outside of the frame. It was pained yellow to match yellow vinyl siding. I decided to paint it white, since I think that looks better. I flattened out a few dents and washed and sanded the trim. When I painted it, all the trim looked good except for one piece. Just in one spot it wrinkled up, about 2 inches in length. I wiped the spot where it wrinkled, then sprayed that spot again. Next the paint wrinkled again around the just re-painted spot. I had this same thing happen when I spray painted the back side of my photo booth monitor bezel. I had not seen this before with any spray paint. I sanded the plexi bezel down and painted it again. Has anyone else seen this behavior? Any idea what causes it? Guess Im going to have to sand down the door trim and paint again. First pic is the door trim, with the before and after second coat pointed out. Second pic is the rattle can spray paint I used. Not a real expensive brand, but not a real cheap one either. Appreciate any advice on what causes this and how I can prevent it again. Thanks. |
| yotsuya:
Use primer? |
| DaOld Man:
I did, but this paint is supposed to have primer in it. |
| DaOld Man:
I dont know if it has anything to do with it, but the can was getting very close to empty when this happened. I cant remember for sure, but I think it was the same scenario with the spot that wrinkled up on the monitor bezel plexi, That was the same brand paint, just black instead of white. Could it be some settled paint in the bottom of the can that is causing some kind of reaction? I shook the can good before I started painting, and shook it between sprays. |
| Ond:
This is usually due to a chemical reaction between the solvent in your new paint and the old paint. It can happen when you spray too soon after an initial coat when the first coat hasn't cured properly or it can happen when you paint with an enamel paint over an acrylic. As paints cure they release chemicals which then react with fresh solvent to cause wrinkling. To prevent this happening sand back old paint to base, prepare surface with primer and allow a few days to dry. Then use the same type of paint to spray, only spray thin coats allowing a few minutes between each to dry off a bit. Acrylic Primer with Acrylic Paint Enamel primer with Enamel Paint |
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