| [GMCnet] Re: Yellowed interior shell [message #363848 is a reply to message #363846] |
Thu, 06 May 2021 10:00   |
James Hupy
Messages: 6806
Registered: May 2010
Karma:
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Senior Member |
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What Sully said!!. It is really no big deal. Most important step is to
clean all the cigarette smoke, cooking grease, etc from the surface. One
thing to keep in mind. Most, if not all, sheet moulded plastics are LOADED
with release agents to make them easy to get out of the molds. Aggressive
sanding will expose more of them to the surface. PAINT WILL NOT ADHERE TO
MOLD RELEASE AGENTS. SO, easy on the sanding here. All I got!
Jim Hupy
Salem, Oregon
On Thu, May 6, 2021, 7:48 AM Todd Sullivan wrote:
> Sanding should not be necessary unless you need to correct surface flaws.
> Scrub the plastics with a strong water based cleaner and red scotchbrite
> pads, rinse well with water, dry and spray.
>
> Sully
> Bellevue wa
>
> On Thu, May 6, 2021 at 7:14 AM Mark Sawyer
> wrote:
>
>> I've used SEM plastic paint in the past with good results...
>>
>> I believe they make an adhesion promoter as well that you can wipe or
>> spray on the plastic before applying paint that will kind soften up the
>> plastic
>> which apparently helps the paint stick...
>>
>> I would consider this a mandatory step, unless you want to do the whole
>> panel again when it starts to flake off in a few months...
>>
>> Also, before using the adhesion promoter, you need to clean the heck out
>> of the plastic... Any silicone (from armor all or whatever), grease, oil
>> etc. and the paint will flake. I believe SEM makes a product for this
> too.
>>
>> Painting plastic can be hit or miss... But I've found if you follow the
>> whole system for whatever brand you choose, (Cleaner, Prep, Adhesion
>> Promoter, etc.) you have the best chance of the paint not flaking down
> the
>> road....
>>
>>
>> --
>> Mark S. '73 Painted Desert,
>> Manny 1 Ton Front End,
>> Howell Injection,
>> Leigh Harrison 4bag and Rear Brakes,
>> Fort Worth, TX
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