I sanded back the entire wing ready for colour. It was 40.6 C / 106 F) outside today (and a record high - ever - in western Sydney of 47.3 C / 117 F), so too hot to do any more work in the paintsuit and full-face mask until later, but lucky I have positive air pressure running through the booth or I would have been toast. I still need to finish off the wing tip ready to match the fine line tape, but I'll do that when it cools down. Hopefully tonight I should be able to put the black base coat down as well. Visual progress!