When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The most important thing you can do is talk to the dye vendor and find out if the specific shade you need requires primer for a correct shade.
SEM is one of the biggest raw material manufacturer that trim shops use to blend dyes, and many of their reds and tans need primer as a base for it to come out correctly.
TT, I just did my seats. The passenger bottom "bucket" was cracked in a couple places and so was the seat back. I just stopped drill the cracks, fiberglassed a double on the inside of the seat and added a little resin to the outside on top of the crack. After everything was dry I sanded both sides. The outside has a pattern on it so I sanded only enough to feather the edge where I had added the resin over the crack. I primed them with white Krylon and painted everything with the rattle can Oyster paint I bought through Corvette Central. I couldn't be happier with the results. I don't know if Oyster just hides imperfections easier than other colors but I'm very happy with the results. You can't see the repaired areas unless you know where to look and look very close. Give it a try. If I can do it so can you.
My 2 cents.