Thanks all, I was looking at solution to seal the fabric for my fabric top. Then discover this z-poxy. Harden wood is just the fringe benefit. Went to fibreglass supply shop to seek some advice at lunch time and they suggest to use the self-levelling epoxy. The product people use to create river table. Got a litter of that at the end. Will report the result once I have test that out.

Cheers.