Some further progress, this time with greenstuff. I had some or so I thought. When I tried to use what I had it was too old, partially set. OK, buy some more - £5-40 for a packet and I only needed a small amout. I guess the remainder will be set when I want to use it unless it used up quickly. An incentive to focus my spare time on this hobby rather than the others.
Anyway here is how it looks now. Next is some sanding and then undercoating.