refinishing topside

[Firewood]

I'm about to re-paint an old boat I just bought. It has some small hair line cracks in the surface. What the best way to deal with this. I've used a two part urethane paint on my othe rboat and it wears like iron.I'd like to use the same on this one.The only thing is I can't seem to find the color I want. Can I get it mixed or something. All i've come across is Interlux brand.

 

[Firewood]

Re: refinishing topside

What I failed to mention is that the boat if fiberglass, the small (i'd call them stress cracks or sun damage) cracks are in the gel coat. In some areas the gel coat is thick and the crack appear to be deeper. I figure the mild ones I'll just sand out, but what about filling the others. Should I use resin or bondo?