North East Composites
used to be on north shields quayside, now moved up to cramlington
£20 or so a gallon incl hardner and pigment if you want it coloured (easier, longer lasting and better than painting it!)
stick one coat on to seal everything nicely, and when its cured but not rock hard, add another coat with a good handful of sharpsand thrown in (dry the sand in the oven first) - will give you a very hard wearing and very non slip surface