Ye it's good, I do it like this....:
1st coat of primer (gray/white doesn't matter, if you paintin it with a spray gun then mix the primer with some thinner...dunno the exact ratio...or since ur doing the skirts a paintcan will do nice...but do it in thin several layers)
sand the primer with 280 grit paper (for the 2nd coat to bond better)
apply 2nd coat of primer (wait a couple of days to let the primer dry...2-3days on the sun could do, but don't put it on the sun right after painting
)
flatten the primer with a 320grit and higher(....meaning start from 320 and work it up to 600 grit, if theres low spot or scratch then you need to apply more primer on these places)
then apply base coat...(2-3 coats are more than enough for skirts...just wet sand the base with 1000grit, if you want to go crazy on side skirts then do 3 coats wet sand with 1000, 4th coat wetsand 1500, 5th coat wetsand 1500 but you don't want to do that
)
wait a couple of days
apply 1st clear coat...(3 coats are enough, also apply hardener and thinner to the clear coat.. and wetsand between 1st and 2nd with 1500grit then wetsand with 2000grit after drying buff the whole skirt with some rubbing compound, then clean it with window washer or something simmilar)
this is how I do it atm
...not a pro but it's what I heard of my friends who do it...
also dont wet sand with grit less than 1000, with a gun get more pressure for clear coat to atomise it as much as possible, don't mind if you get too much clear somwhere cuz you will be sanding it anyway....just make sure the clear gets everywhere....guess thats all