I used the duplicolor low gloss black engine enamel on almost all the parts of my motor, whether they would see heat or not. I just used a number of coats, no specific primer or anything, just prepped the surface really well and so far everything looks great. I have not fired the car up yet so I do not know how durable the paint is to heat and wear and tear. As far as application goes, the paint is great and doesn't like to run which is nice. I found that the more coats the better and the deeper the pain appears. Best of luck.