Im not sure how hot these covers actually get, but i dont really think it would be hot enough to need heat retardent paint, also wont the fire retardent paint need put on with a brush which might not look to swish, if your planning on your planning on doing it yourself id say try spray cans first and if it all goes peat tong then go for the caliper stuff, i would however say that if its not hot enough to melt the plastic its not going to make the paint peel. anyway make sure you give it a rub with scotch/scratch pad i dont actually know what there called, we use red ones at work anyway to prepare plastics, that'll stop it flaking