Thanks guys... now i know where i will be heading. Guess i will be anodising the aluminium by 2 microns. but short circuiting the 2 metals together would be a little problematic as i have no "SAFE" power source to do it.
Still swiftech does a fine job for their aluminium tops is there a site which uncovers the mystery of the coating on top of swiftech blocks....i may want to read it up