> Problems like this are often related to outgassing. Since the outside is
> already sealed, any trapped air can only get out on the wet side. If your
> boat is warming up it will tend to raise bubbles. Glassing in dropping
> temperatures will cure the worst of this sort of problem.

thanks, I hadn't though of that

> Also be careful that you don't over pull the cloth so it tries to bridge.

Actually this I think this is more my problem, just getting it to initially lay flat,long before it starts to cure.

You know get it flat in one spot and as your trying to fix it all you do is screwup another spot. Never getting it to contact the entire surface all at once.