I've ben doing body work since 1974 and never used that stuff a waste of money you do all your final sanding with 80 grit then lightly sand with 150 then good 2k epoxey primer let it sit over night and block sand with 150 reprime and if you need to re sand use 240 then 320/400 seal and paint but its all in how you want it to look but doing a good paint job will cost a lot just in mat. its your toy good luck