I had good success using SEM also. I found a set of perfect '68 Charger seats in green. I had white interior. I had the paint shop mix up some white, or maybe they just gave me a can of white, can't remember, and they turned out great. Couldn't tell they were sprayed, even in the pleats. Prep is key. Who knows how much Armor All, silicones, or whatever is on there. I used trisodium phosphate and a Scotch Brite to scrub the seats down using plenty of water to actually flush all the contaminates away. Just wiping it with whatever solvent just dilutes what's on there. It didn't peel or wear off as long as I had the car, and it covered great, white over dark green.