iv acquired some s100 engine brightener to keep my black powder coated engine black but before i use it i would like to ask, do i just spray it on & leave it? or do i have to wash or wipe it off? if i have to wipe what do i use because when ever iv tried to wipe any kind of cloth, towel or duster on it before, it leaves lots of bits of fluff from the cloth material on the powder coated areas as its quite a rough/textured surface. finally if i by accident get some of it on mt chrome areas (pipes, derby cover, timer cover etc etc) do i just wipe it off & it will be OK or is if fundamentally important i dont get any on the chrome? thanks in advance for any advice & info.