I'm sorry, I mentioned the satin clear calling it "matt clear" of course "Matte" maybe would have caught your eye.
Yes, you have to use the matte or satin clear (same thing, you say tomato I say tomAto) or the gas will mark the flat finish.
Yes you could remove the stickers the same way. Being careful not to cut thru the paint under it, that would be the key.
Brian