Why do you want to use epoxy?????
I don't think it will give you much advantage over the top of an existing polyester layer.

But yes if the polester is well and trully cured, and you've sanded it right back it should stick ok.
There is a danger when one of the resins isn't fully cured, the vapours it gives off stuffs up the setting action of the other. Not sure which way round it is, possibly both.

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Originally posted by bolgo

epoxy - why not?

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well cost comes to mind, as well as health issues.
If you use epoxy make sure you wear gloves, if you get any on you clean it straight off, (and probably not with a chemical solvent, that might just get the stuff past your skin much faster). Once fully cured it's fairly inert, but at room temperature that can take several weeks, so watch sanding dust as well.
There's a few guys around badly sensitised to epoxy, one I know can't even get near peaches, because there's a chemical similarity with epoxy somehow.

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just mucking around with an old board, never know where it might lead to

maybe even looking at carbon fibre or kevlar just to keep the board shark proof!!

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yes well it's all good fun, and there's nothing more satisfying than going off on stuff you've built yourself.
Just don't make it too heavy.

kevlar $50 per m - might leave that for now!
no carbon around as being all used up on aeroplane wings and bike frames - no good for board anyway poor compressive qualities

lightness is the goal hence the epoxy choice

occupational allergies part of my speciality so i'll keep my hands out of the mixing bowl

thanks for the advice