Hi,
I use polyester filler (2pack) as the coat on which the mold is built. It can be polished to a high shine, and I never had a "sticker". I also used it with Unimold system, and its proven to work perfect (I use 6 coats of wax, no easy-lease, no pva).
So I'm with Ragece for the polyester paint. Much more thin, perfect for molding an existing part.
From my experience, I would highly recommend a test panel before you proceed to your final part when you get new products. Chemistry is sometimes a bi***. I know it's one lost day of testing but it can make the rest of the week go better
I got a question about your part: saw you used spray glue to tack the fabric to the mold. It may not be clear in the pic so: does your part have cosmetic "residues" from the glue? And if not, would you share the brand and type of glue.
Thanks, and keep us posted with your new parts
A $1000 electronic device will always protect a 10 cents fuse