I rubbed it down again and did some better filling and I managed to get a coat of paint on today, the wind is really not helping.
It's definitely going to be an improvement to the bubbling splitting mess it was and the other touch up bits will make a big difference. I also treated it all to help with the rust. (i'm trying to convince myself i'm not just bodging it, I can hear Fuzz Townshend disapproving from the future)
Once i've done the final coat is there a good polish for freshly done cellulose paint that will help my less than professional job shine? I've got some AutoGlym Super Resin and some MER somewhere I think.
Thanks for the tips!