Hi i am a complete novice but so far after following advise on this forum the panel i have sprayed on my car is looking good but i dont want to mess it up now!. i have painted in metallic on a repair around a ka filler cap and have flicked to paint to blend in the panel. the flicked areas are rough. can i use 1500 grit wet and then apply the laquer. also i got some shadow laquer to blend in to existing paint, does this go on when laquer has dryed. thank you for any help.