I basically, rubbed them down, filled the grooves with chemical metal, sanded it down again with various grades of wet n dry, primered it, a few coats of that, rubbed it down again and then sprayed a few coats of Satin Grey, a Citreon colour
That was my first attempt at refurbishing wheels, just be methodical about it, get yourself a road cone as a stand, I'm lucky and already had 4 of them and take the tyres off it's easier.
When you come to have the tyres remounted make sure the paint is fully hardened otherwise you'll be fooked!