Re: Did I Get Screwed?
Lots of bad advice along with some good in this thread. First of all the name of the automotive paint which can be, and often is used to paint boats is IMRON there is another paint which is only used on boats called Awlgrip, either will do the job, but Awlgrip is more expensive and in some conditions lasts longer.
You say you have stress cracks, paint will not fix stress cracks and you will still see them on the newly painted hull.
Prep work is definitely the key. You need to get all of the old paint, wax, and anything else besides the gelcoat, off the hull before you paint it. The hull will also have to be sanded with at least 220 grit abrasive to give the paint something to stick to. If I were doing it I would just sand the old paint off, since you are going to have to sand the hull anyway, but you can use paint strippers made for fiberglass. You'll need to sand, sand and sand some more. After each sanding wash the hull with acetone to get any wax or other contaminant off. When you are done there shouldn't be a shiny spot on the hull.
Imron is best sprayed on, the two part gives a better result than the single stage. Awlgrip can be sprayed or "rolled and tipped." "roll and tip" is a involved technique and if you are interested try a google search. Too much to type in here.
Bottom line is that you screwed yourself with poor prep work, spraying the paint on is the easy part of the job. BTW - Imron paint is widely use on cars.
BTW, my boat is painted with Imron, has been for the last 8 years now and after compounding and waxing she looks like new every spring.