29:th-Mar-2016, 08:13:56
God I have done that in a few years and it was on different cars.
I assume you are doing this to the plastic cover for the engine.
I used to soak the cover in Gunk for a day to help get all the unwanted grit and oil off it then let it dry for a day.
Now you have a couple of options 1 is just to slightly rough up the surface, clean and apply a high temp primer then paint or smooth it out and get it how you want then primer and paint.
I always used high temp paint to reduce the likelihood of flaking or discolouration.
I assume you are doing this to the plastic cover for the engine.
I used to soak the cover in Gunk for a day to help get all the unwanted grit and oil off it then let it dry for a day.
Now you have a couple of options 1 is just to slightly rough up the surface, clean and apply a high temp primer then paint or smooth it out and get it how you want then primer and paint.
I always used high temp paint to reduce the likelihood of flaking or discolouration.