Hi v, ive allways done mine myself. Its not a very nice job but if you take your time the results aint bad. I restore the tyre bead first, wire brush and emery cloth work. I then restore
the alloy rims, if they are badly oxidised then use a chemical alloy cleaner to shift the grime and corrosion , once you are happy you can get the polish out. I use a course sizel wheel (small) and a grey soap for the initial run, after that its just tayloring down the soap and use softer wheels as you go, in the end they will gleam! but it could take a while, I have spent more than a day doing this. As for the paint and after going down the masking , priming, spraying route, I know opt for for a brush on job. Cleaning surfaces is vital for a good key, and good finish. Use a top quality artist brush about a quarter of an inch wide and you wontneed to mask off., and the paint I use is halfords satin black engine enamel! Its the best match and shows no brush marks, after about 3 coats the result is fantastic, and its very durable and tough. Dont forget the enamel thinners...to clean the brush

good luck.