Hey Benny
I did our 25'
express cruiser a few years ago with Interprotect. It's not hard to
work with just follow the instructions. I'm assuming you're not going to take all the
gelcoat off? The yachtpaint.com web site has good instructions on prepping the surface for barrier coating. Be careful once you get your
hull stripped that some of the crazing isn't actually spider cracks. They're potentially problem areas that barrier coat will not fix.
Get good rollers when applying the
epoxy barrier coat. The
cheap foam type from the big box stores won't
work. The
epoxy components will eat the foam right off the roller handle in only a few minutes. The best ones I found were the short nap rollers from TimbrMart.
Doing that job outside is almost a must. The fumes from the epoxy
paint is noxious and dangerous. A good respirator and tyvek suite (or sleeves) is essential. The stuff gets everywhere!! We followed up with XXX
anti-fouling and that's nasty stuff too. Don't ever sand it, the dust will kill ya!
It's a good job for the DIY's as long as you take time to read the instructions!
Good Luck!
Rick