if you took a carbon fiber Hood
to a paint shop, they would clear coat right on top of that . . .
if reference to glass. . .
after you make ur mold and do all ur forming and you use bondo to make it smooth. a lot of sanding.. more bondo. sanding. . . bla bla bla. . make it baby smooth. prime it, sand it. smooth blah.
take it to a body shop, and they will prime it with their primer and then paint it, and clear coat it.