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Old 02-09-2018, 09:05 AM
bluegill25 bluegill25 is offline
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Exterior Plastic Paint

I am new to to WetCanvas and it was suggested that I ask this forum what I am looking for. I have a largemouth bass mailbox that I repaintes last year with craft paints and sprayed polyurethane on (5 coats) but by the end of summer it peeled really bad so I was wondering if there is any exterior plastic paint out there that I can use. All I have found so far is one with only 2 or 3 colors and I need more than that. Any suggestions would be greatly appreciated.
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Old 02-09-2018, 10:25 AM
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cliff.kachinske cliff.kachinske is online now
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Re: Exterior Plastic Paint

What kind of plastic is the mailbox?

Google 'primer paint for plastic.' Omit the quote marks.
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Old 02-09-2018, 03:08 PM
old_hobbyist old_hobbyist is online now
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Re: Exterior Plastic Paint

If the box is METAL acrylic should stick well so long as the box was thoroughly cleaned and oil-or-soap film free. If the box is plastic it is either PVC or polyethylene. If it's PVC (and is thoroughly cleaned yada yada), acrylic paint will stick to it. If it's PE, there are special primers (I believe a company like ZINSSER) for untreated PE.
Now to another issue - polyurethane (PUR). PURs adhere very well to acrylics. BUT many types of PURs are not UV-stable and therefore not designed for exterior use. Traditional methods of failure include cracking and peeling. If the PUR has a better bond with the acrylic than the acrylic has with the mail box... You fill in the blank.
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Old 02-09-2018, 03:16 PM
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Re: Exterior Plastic Paint

I'd skip the coating , just paint it.
I painted a metal mailbox for my parents, Rustoleum type spray paint for base https://www.rustoleum.com/product-ca...2x-ultra-cover

Then I did the address & name with some craft paints.. and that was it..it has been good for years like that..
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Old 02-09-2018, 03:59 PM
old_hobbyist old_hobbyist is online now
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Re: Exterior Plastic Paint

Quote:
any exterior plastic paint out there

Essentially all acrylics are suitable for exterior. They are very resistant to weathering. That's why "latex" paints are used to paint exteriors of buildings. The only issue is that some acrylics are not color-fast. Meaning that they will fade over time.
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Old 02-10-2018, 01:11 PM
bluegill25 bluegill25 is offline
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Re: Exterior Plastic Paint

Not sure what kind of plastic it is the mailbox was given to me as a present and was purchased from Bass Pro Shop.
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Old 02-10-2018, 03:37 PM
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Re: Exterior Plastic Paint

Look for a recycling mark on it somewhere.

Did you do that Google search?
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