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I am going to paint my chassis (black) and under the hood of my truck (white) with Nason paint. I understand this paint is quick to dry and relatively hard after curing. Will the black stick to my plastic inner fender panels? Any special prep other than a Scotchbrite pad and a wipe down with grease and wax remover? is there an addative I should put in the paint for the plastic?
I will be using a pressure pot so I can spray upside down.
Dave
 

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Rather than paint the plastic I clean em up real good with Laquer thinner. Gets all the road tar off and they look like new.
 
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I have to agree with Dave, I wouldn't paint them. There is adhesion promoters that are generally used for plastics, and flex additives. What you may run into is that they still will not hold paint. I know several years ago, I ran into some problems with painted bumpers on cars. What I found out is that some are made to be painted and some are treated, and cannot be painted. Something that is added to them, to make them stay black, keeps paint from sticking to them.

Maybe Barry or MartinSR can shed some light on this, but I would keep them black.
 

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Glad the Jeep is on the road
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Most normal automotive paint does not stick to plastic bumpers, fender wells, etc. because the paint does not flex as well as the plastic. The paint has to be formulated to tolerate the flexing which is possible, just not simple.

Maybe the technology has changed but 15years ago the factory used a low-temp bake and a softer finish 2K paint of a completely different formulation than the main body to paint plastic bumpers.

Talk at that time was to go to a low-temp water base for the entire body but like a lot of technology that has been slower in coming than predicted.

I agree with the "clean it up" suggestion. We did the engine compartment of the Jeep in rattle can black primer, but the Jeep is sort of a rat rod look anyway, and the way the boys will drive it I think "easy repair to respectability" is better than "professional looking product".
 
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