Interior paint for outside?
I painted letters and few pictures on plastic (or plexiglas) sheet to make a sign for outside and I used interior latex paints. Yikes! What medium do I use to protect the paint so it would last a long time? Clear Krylon Spray Paint? Please advise? Thank you.
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Could you seal what you painted between another piece of plexiglas with maybe glue on the edges or clips
Sorry. I don't think a polyurethane will adhere to the plexiglas. Maybe you could try mod page or elmers clear glue?
I don't think it will sink in to the plexiglas it may just lay on top. Can you try it on the back or another piece as a test? I was also thinking of a product I found in either ACMoore or Michaels that is Clear but self sticking. Maybe you could lay that on the top of the project. Will the item be under cover outside? Another thought could you put it in a shadow box picture frame and hang that outside. You could polyurethane that. Don't know how it would look where you want to hang it but it is an idea.
The sign is huge. 6’ x 5’.
Mod podge or Elmer clear then?
Three coats of a water based polyurethane should work. The solvents in spray paints can disfigure/melt the plexiglass. You used interior paint - no problem. Many acrylic craft paints people use for outdoor painting are latex based.
How about posting your project here. Very interested to see it.