QUOTE(dave1 @ Aug 7 2008, 05:03 PM)

Yes, thanks for your input PJ S. Just looked on the Bilt Hamber site and found it very informative. Still not 100% certain about any possible negatives on the metallic paint. Think I may get some though and try it on a bit of the wife's car

to get used to using it.
As I said above, the clay bar won't affect paint, irrespective of whether it's metallic or pearlescent, and singlestage or clearcoated.
Think of claying as using a lump of plasticine to remove blocked pores in your skin.
All those black and white heads are the bonded contaminants, and the plasticine pulls them out leaving your skin cleaner and fresher looking.
As spearsy said, if you want to deep clean the pores before putting on the "moisturiser", then a cleanser is needed.
If you use Autobalm, then something like 50% diluted IPA (Isopropyl Alcohol) or panel wipe is best.
If you go down the wax route, as opposed to sealants like AB, EGP, then a glaze would be an option to enhance the appearance. You've many choices from Zymöl's HD Cleanse, Swissvax's Cleaner Fluid (medium is slightly abrasive), Meguiar's #7, and Dodo Juice's Lime Prime Lite (LP has micro abrasives), and Clearkote's Vanilla Moose Hand Glaze Wax (a bloody mouthful and ultimate daft way of simply saying "vanilla smelling Glaze").
Any one of those under a wax would be an alternative to just a clean panel as provided by IPA/panel wipe. The oils left behind in the micropores and voids are designed to add a bit more depth/wetness to the looks once the wax is applied.
Don't use with sealants, which are more fussy about what they bond to.
But in all honesty, I'd be extremely surprised if you found the appearance Autobalm provides to be anything less than very pleasing.
One other thing - SRP is an abrasive, and continual use will be like rubbing a fine sandpaper on the paint. Over time - quite a bit admittedly, you'll lose precious µm of paint or clearcoat.
Fine if you're removing swirls/light scratches and using a proper wash/dry technique to prevent further defects, but if the paint has been properly deswirled, then there's no need for SRP.
If you're using it for its swirl masking ability, then save yourself the hassle of it and EGP for a half decent durability combo, and use the better masking ability of Autobalm, not to mention its superior durability too.
A bit more expensive than the AG twins, but then only a smidgeon is needed to cover a panel, so it'll last a long time before needing replaced with another jar.
So, some food for thought before rushing out and spending money on the first thing that comes to hand or grabs your attention.