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 Post subject: Paint Help! Barrior Coat on Plastic Knobs
PostPosted: Dec Sat 22, 2018 6:28 pm 
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Joined: Apr Thu 29, 2010 8:53 pm
Posts: 88
Location: Arkansas 72204
Does anyone have any suggestions as to what to use as a barrio coat/cover coat on plastic knobs when trying to paint to match a case color?
The solvent in the colored paint I am using is attacking the plastic! Getting the colored paint to attach to the knob is not a problem, it's eating into the plastic is the issue!
I'm sure others have had this problem. Thanks for any suggestions!! Merry Christmas!


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 Post subject: Re: Paint Help! Barrior Coat on Plastic Knobs
PostPosted: Dec Sat 22, 2018 6:45 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 9851
Location: Mountains of Mourne. Ireland.
I use Max Meyer 1.880.2000 a one-pack etch primer in a rattle on plastic radios - never had a melting problem.

Image

They market a 1K adhesion promoter (1.880.1600) for plastics - never tried it.

Greg.
not a paint expert. Lol


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 Post subject: Re: Paint Help! Barrior Coat on Plastic Knobs
PostPosted: Dec Sat 22, 2018 11:24 pm 
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Joined: Sep Tue 30, 2014 6:08 am
Posts: 4695
Location: Norfolk, VA
There's also a 3M product for painting/priming plastic bumpers. Match-a-Color has some plastic paints as well, and may have a bonding primer for plastics. I recall seeing one for priming plastic wheel covers at NAPA.

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Brian
"Capacitor Cosmetologist since 1979"
USN Retired 1984-2006 (Avionics/Cal)


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 Post subject: Re: Paint Help! Barrior Coat on Plastic Knobs
PostPosted: Dec Sun 23, 2018 12:54 am 
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Joined: Jul Thu 29, 2010 5:35 am
Posts: 1125
Location: Simonton, Texas
Fine sand the places where the paint attacked the plastic if regular sand paper won't work try wet sanding them.
Prime them with one of the above mentioned primers. Let the primer dry for a day to expel any solvents in the primer. Then you should be able to paint them with no problems.

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 Post subject: Re: Paint Help! Barrior Coat on Plastic Knobs
PostPosted: Dec Sun 23, 2018 1:44 am 
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Joined: Apr Thu 29, 2010 8:53 pm
Posts: 88
Location: Arkansas 72204
Thanks all for great suggestions!!


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