if the part is under a constant high heat you will end with a matte finish in a few weeks if the part dosen't take any heat the part will remain the same for a long time
also if you don't do a good prep it will peel off under heat
but other that that the colors are great and the parts will amaze you
cerakote also has a clear that goes over the colors and give them a glass look that you simply won't belive but caswell doesn't carry them.
for valve covers I prefer powder coatings you can do so many things with powder coatings and it will remain the same for a very long time
I have some valve covers that I did almost 2 years ago and still look great. but if you say the cover will get to 800 powder coating will not work for you .
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