In my experience I have had the best results in

1. stock replacement with copper spray
2. Mitsu MLS with copper spray when no resurfacing has been done
3. Mitsu MLS without copper spray, surfacing has been done
4. Cometic HP without copper spray RA40 finish or better

Not had good luck when spraying Cometic HP at all

Hope this helps

Matt
MFG Racing

http://dsmregistry.com/detail.php?carid=1310