Mate, Any Basecoat Metalic Paint will be fine for your wheels. If i was you i would do this :
1. Rub down wheels to get rid of lacquer on wheels now
2. Fill any nasty deep scratches (Easy 1 is fine)
3. Use wet & dry sand paper to rub down the edges to get rid of any kirbing maks
3. Spray 1/2 coats of aerosole AUpol Acid 8 Etch primer
4. Spray 1/2 Coats of Upol High 5 High Build Primer
5. Recoat in Polyester Basecoat Silver (reccomend 4/5 Coats)
6 Lacquer Wheels (more coats, more protected they be)
7. Once fully dry give a good Polish.
Danny