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Thread: Painting plastics

  1. #1
    Full Member Big Sig's Avatar
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    Default Painting plastics

    I need to do a small spray job on my front irmy spoiler. What do I need and how do I do it? I take it I need to rub it down - what grit sizes? - primer, paint and clear coat? Anyone fance giving me a quick "how to" on the basics?

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    Now I need a turbo to keep up!

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    Regular Member Silver V's Avatar
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    you need plastic primer as well.. or the paint will fall off or just crack!

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    So thats, plastic primer, primer and then paint? what about rubbing it down?
    Now I need a turbo to keep up!

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    sorry mate just plastic primer.. if the plastic is smooth already then you just need some stuff called scotch. looks like brillo pad stuff but no where near as abrasive, thats what I would use to rub down if smooth already as the paint just needs something to grip onto and this stuff does it perfectly. But I think you can use p240 sandpaper.. I may be wrong tho as I am not a sprayer. both my bro's are and I help out every now and then. another thing is to clean the area with something that is non silicone based.. I have no idea what this stuff is called that they use to clean the bits with but its like a bandage and is kinda sticky ( dont think you'll need to be this professional though

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    Full Member Big Sig's Avatar
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    its quite rough from where it hits kurbs and car park ramps so I'll get some p240 if thats what I need, I'll have to have a look. I'll get some scotch brite pads from work tomorrow night. And some degreaser like electra clean to remove any grease and debris without leaving a residue.
    Now I need a turbo to keep up!

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    p240 is not too abrasive but... it did leave marks on my bit of plastic as I was experimenting on, also to note... I did not primer it either lol ( they are getting re-sprayed properly tho)

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    I'll get a selection then, its a home made effort i'm attempting, so as long as its not too noticeable i'll be happy, looks terrible as it is. Thanks Silver_V
    Now I need a turbo to keep up!

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    no worries mate. sure someone will have some better info 2morra.

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    Use 1000 grade, the higher the grade the smoother the finish, if you have any worries an old trick is to use soap on the grit paper.

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    yep, hot water with a bar of soap in the bottom of the bucket to lift off any wax left on the car..fill any damage if needed..then just start sanding back till it's smooth.. aim to end up at 500 grit, then run all over it with coarse scotch pads, use circles not lines as it'll show afterwards..

    get a high build primer on to fill the sanding marks and just paint the repaired area with it, no further.. allow to dry , then flat back again with the scotchbrite pads..apply colour coats to the primer aiming for an area about 3" all over bigger than the primed area ( if the colour match is any good it'll be invisible).. allow the paint to fully harden, then flat that back again lightly with scotch ( it'll look terrible afterwards) and apply the laquer. aim to laquer an area about a foot bigger than the repair or to a convenient body moulding line to hide the join..leave to harden, then after about a few days, either use G3 or a similar cutting compound to just cut through and slight overspray and bring up the shine..

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