Re: automotive paint?
you have some excellent points,but not so true anymore yacht dr. i'v been working with the automotive paint lines for over 40 yrs. the new products that are on the mkts. today are awesome to work with,and touch up,or to (spot in) is a breeze ! overall finish should be completed as follows---
1.wash boat good with strong tsp solution (tri-sodium phosphate)
2.repair,and finish off all bad cosmetic areas/sand back area at least a couple in. w/180 or better
3.prime only ! small areas that you repaired w/urathane primer--2 component
4.sand entire boat w/360 or better, including primed areas
5.hand wipe boat w/strong solution of ammonia,and water--wipe dry
6.apply 1 wet coat automotive non sanding--epoxy sealer --2 component
7.apply basecoat of your desired color (note)always tack between all coats of product
8.apply 3 coats of urathane clear--2 component -if need be- finish off with 1500 sandpaper,and buff
9.any repair work can be done by sanding back twice the area to be repaired(rule of thumb is 1 ft', w/1000 paper--basecoat the repaired spot only,and finish off the rest of area you sanded with(spotin)clear
steven