Sorry, didn't notice the last two posts! I used hycote gloss black, with a hycote primer underneath and a hycote clear lacquer to finish. I think a good even coat of lacquer is the key to making it look good. The finish isn't as perfect as it looks in the photos, but that's down to my (lack of) skill rather than the products and I doubt anyone will ever notice apart from me.
I didn't sand down before painting. This paint will definitely not come off easily, as I discovered when trying to remove attempt number 2!
I wouldn't say it's an easy job if, like me, you've got no experience of this kind of thing. It took me 3 attempts plus a new set of the hoops themselves after really cocking up the originals on the 2nd attempt. Bit of fun if you like a little project, and the worst case scenario is you have to buy new hoops at 30 quid each.
I'm now trying out some blue brace covers behind the front grill, will leave them on for a week or two before I decide whether to paint them. First impression is they look a bit too hot hatchy, but I'll see if they grow on me.