anyone has any ideas? as i saw many companies do that. what they use any clue? as we tryed form like guys do bumpers then layed frp and sanded and carbon on top but after sun heated for and steering started to change shape. any ideas what can be used?

It sounds like it is a resin suitability issue and the part is going past its Tg/HDTm so check your resins tech data and post cure procedure (but i am no expert and others may know better )

as like you can see Robson design they offering that. look at their facebook. and color of parts after polish like grey?any thoughts what kind of resin. as polyster gives like blue shadow, epoxy clear, vinylyster like grey.