First job of the morning is to flat back some of the etch primer. I just used a bowl of water and some 400 grit wet and dry paper. When I was happy with the surface it was time for primer.
It's a totally miserable day outside, so I did the best I could in the entrance to my garage. I'm really happy with this side of the hub (above), it's only got one or two flaws I can see that will easily disappear with another flatting with the wet and dry. But other than that, it looks great.
On the other side, a bit more work flatting will be required. I don't know whether I didn't clean it enough or if some dust blew on it, but there are a few spots that need attention to get it perfectly smooth. Hopefully, some of them will flatten out by themselves like the etching primer did when it dried. If not, it just means a bit more time sanding. Not to worry.
I'll leave it a good few hours to dry off now because of the weather.