You will have no problem powder coating rover wheels, as long as they are VERY clean. I did my 47 cj3a steel wheels years ago in battleship grey and they look good as the day i did them. I would recommend this process: bead blast, bake, wipe with acetone, bake, apply powder, bake to cure. May be overkill but this way you have no reason to not have a perfect finish. Check out eastwood kits and do it your self, you'll probably save some serious dough. Get a cheap oven off craigs list and you'll be powder coating everything you can (like me) beware rover wheels dont fit in a standard oven without the door staying open just a little, no big deal just cook longer.
1970 Series IIA 109 EX-MOD
1971 Series IIA 109 EX-MOD
1982 Mercedes 300TD
1989 RRC
1993 D110
1994 RRC LWB
1995 RRC SWB Brooklands Edition
1995 RRC LWB
1995 RRC LWB
1995 Disco
1996 GMC 2500 Suburban
1996 Disco
1997 Disco
2001 RR P38
2005 LR3 HSE
2006 RR HSE