Thanks for all the advise on wheels coatings.
I finally went for POR15 which have a mag wheel clear which is 2 part and very easy to use. Takes around 4 days to harden but comes up nicely. 1st coat I sprayed on which went on nicely but as I'm not much of a spray painter the normal runs appeared. As this stuff take so long to touch dry it tends to self level so your crappy spray job ends out nicely. This gave me the idea to brush on a 2nd coat as the raw metal surface is porous and soaked up 1st coat.
Overall and easy product to use, comes in kit form with all you need ($75) and I'm happy with the result.
Thanks again
Leeroy