Just when you think it is all going so well!!!
I have now got to the point of building up the final rudder shape with epoxy filler.
I do not have enough of my preferred filler, International Watertite Pic 92 which I used when I built the hull but is expensive. I have been recommended various car body type fillers, but these are all large tins, most of which I will never use. Whilst pondering this my son said he had a tin of Fibral fibreglass two-part repair resin Pic 93. I did a small sample on some ply and this seemed to cure ok and sanded well so yesterday I used it. After 5 hours it was obvious it was not curing properly, and some 22 hours later it was still taky.