Yellowed Interior Plastic

Discussion in 'Interior City' started by Steve73GS, Jun 8, 2019.

  1. Steve73GS

    Steve73GS Well-Known Member

    The plastic interior pieces on my car have yellowed and don't match the vinyl. Any suggestions on what I can apply to the plastic to whiten it to better match the vinyl? Thanks.

    Steve
     

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  2. pglade

    pglade Well-Known Member

    Nothing will "whiten" it. You'll need to remove the pieces, prep them properly and then go through a paint/dye process. You may be able to find a off-the-shelf color match in the SEM Products line of interior plastic and vinyl paints. They have at least a couple white colors...Sail White and Super White. The Super White is actually not a bright white but slightly off-white.
     
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  3. Steve73GS

    Steve73GS Well-Known Member

    Thanks Pglade. I was afraid that was going to be the case. I know sometimes the plastic gets brittle over time too...looks like I'm in for some "fun".

    Steve
     
  4. GS Spoken Here

    GS Spoken Here Well-Known Member

    Another problem with white is it flakes off. I have used SEM sail white on my 68 with white interior.
     
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  5. Steve73GS

    Steve73GS Well-Known Member

    Yep, have some flaking in some areas that were chafed against. Tks.
     
  6. UNDERDOG350

    UNDERDOG350 350 Buick purestock racer

    I'm going thru the same thing with my 73 right now. Using the SEM plastic paint with Bulldog adhesion promoter.
     
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  7. 69a-body

    69a-body Well-Known Member

    Has anyone tried blasting with corncob or walnut shells ? I wonder if it would remove chalky layer.
     
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  8. telriv

    telriv Well-Known Member

    It will ALSO remove all the graining.
     
  9. UNDERDOG350

    UNDERDOG350 350 Buick purestock racer

    telriv is correct. For some odd reason white interior parts chalk up and disintegrate way faster than darker colors. Best to locate darker color parts and then paint them white.
     
    Last edited: Jun 10, 2019
    Steve73GS likes this.
  10. Steve73GS

    Steve73GS Well-Known Member

    Underdog,
    Have you painted any of the pieces yet? If yes, wondering how the color match worked out with the SEM? Which SEM color are you using?
     
  11. UNDERDOG350

    UNDERDOG350 350 Buick purestock racer

    Yes have painted the A pillar trims. Used SEM super white 15103. It matches pretty good. If the plastic is sound enough scrub the parts with the recommended cleaner, rinse and let dry. Then use the Bulldog adhesion promoter or recommended SEM adhesion promoter, then paint. Let it dry at least 24 hours before handling.
     
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  12. Steve73GS

    Steve73GS Well-Known Member

    Thanks Steve. I guess you found the super white was a closer match than the sail white? In any case, this is an all or nothing proposition...would look just as bad painting only some of the pieces as none at all. Did you have to locate parts to replace the flaked pieces? If yes, were they somewhat available or was it needle in the haystack tough?

    Steve
     
  13. UNDERDOG350

    UNDERDOG350 350 Buick purestock racer

    Yes super white is the closest match. Parts are needle in a haystack. The a-pillar trim is reproduced and very nice. Go to Elcamino MFG.
    Parts Place has door panels without provision for the carpet insert. They also have armrest pads. REM makes the package tray. From my research nothing else is offered as repo. I have not found any of the rear side trims. For now I'm going to paint mine and try to get them back in without destroying them. Long term if they are not made I am going to form my own panels from sheet aluminum and glue matching vinyl to them.
     
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  14. hugger

    hugger Well-Known Member

    On plastic trim if you take thinner in a spray bottle and mist a lit coat followed by Bulldog then directly hit it with color you cant claw the color off it kinda becomes one if you will. But line Steve said you gotta have some what healthy plastic to work with. Also warm the part up with a heat gun first
     
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  15. Steve73GS

    Steve73GS Well-Known Member

    Thanks guys, appreciate the help!

    Steve
     
  16. UNDERDOG350

    UNDERDOG350 350 Buick purestock racer

    Some photos of my plastic painted with super white. Where there is cracking in the plastic you can spray on lots of paint and it will cover. You almost can't make this stuff run.
     

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  17. Steve73GS

    Steve73GS Well-Known Member

    Tks Dog. Looks like it matches pretty well.

    Steve
     

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