You can bake it, I personally didn't and left it for a week before sanding off the lettering. If you don't put it in the oven, it does say to leave at least 48 hours before any re-assembly which to me meant any sanding etc....
I'll admit it doesn't look perfect, I think where there was slightly thicker paint left on it is where the patches have appeared. But IMO it is just a engine cover and I just wanted it to look fresh. If you're a better sprayer than I am, which isn't hard, then it will look better than that. TBH unless you're really looking at it closely it looks good!
As for how much I used, that was 1 can, including the strut bars.