[stephen low]

Guys the talc like material should be what are called micro balloons and it is a thickening agent for resins. Should be able to be got at any decent fibreglass supply shop, particularly epoxy suppliers.

Use at least a basic dust mask and be careful not to breathe the micro balloons in as they are very fine particles and are not good for your health long term - then again that first corner in the new cobra at too high a speed may not be good for the health either!!

Another good product I've struck for very fine filling and sanding is made by International marine I believe, and it was a green colour, can't remember the name. Very easy to spread and fill just like a bog but very very easy to sand and tough as well.

Have used these products building a f/glass yacht so know they work well and no I am not on a commission.