I am preparing my engine bay for my newly rebuilt 455,,,I want it to look just as good as the engine,,My main concern is the plastic wheel well liners,,,I have prepped them and painted them but they just dont look good..They have to many imperfections that show through the spray paint...I used truck bed coating to cover the cross member and firewall,,,That stuff goes on thick and covers any imperfections,,Can this stuff be appied to plastic? It would work perfect on the plastic wheel well if it will work,,,Anyone use this stuff on plastic?

 

What did you paint them with? Most paints don't adhere well to plastic. Can you post pics of what they look like?

You might want to check with a local body supply/paint in your area. They might be able to give you a good lead on the type of bonding agent and paint you need to use.

 

i painted them with bumper paint i bought from autozone that is meant for plastics,,,

 

Use SEM satin black, it is durable and it coats excellent. Not a cheap process because of the prep and the prep materials required.

But you get what you pay for.

 

The SEM 'surecoat' will require their 'adhesion promoter', even if the datasheet may not say to use it. I learned the hard way...

My inner fender plastic looked a bit ragged but I used fine-medium scotchbrite on them and used medium-light pressure. They looked almost new afterwards.
Of course this will be too difficult if they were painted already.

 

I hand buffed the inner fender wells with 3m plastic polish. It took a long time and it was a pain but hey came out nice taking a lot of the fine scratch's out. You may be too far to try this approach.

 

Did you remove the inner fender wells when you painted them? If not then you might consider removing them and cleaning them thoroughly before painting them. I would think the Krylon Fusion paint that you can get in the hardware store would work well. I used it on some interior pieces in the past with great results.