if you open the pics i posted you can see that the filler is done in1st photo and sanding has begun see where the metal is showing its a high spotso it was tapped with hammer and refilled with a small amount of filler and ajusted and spot primmed in 2nd and 3rd photo how much color differance there is after sanding?remember your paint will reflect your prep so dont be in a hurry :bananaman also i dont know how any one else feels but think i would keep air line dry as possiable add oil to tools ai end of days work and blow out before use a way from car oils will result in fish EYE and no one wants that