Tough call...

I have used my Cometics 3 times on the same block, 13.5 CR, NA. I just used kerosene. I didn't take them apart, but I did rinse between them, then dry, then cooper coat top and bottom only (not between).

The first build was together for 2 years with my aluminum Stage VI heads, the second only a few months (cam broke) with aluminum Indy 440-1 heads, and now they have been on for the 3rd time since July 2008 with the same Indy heads.

It is weird reusing them. Especially when some of that thin Viton coating comes off when cleaning them.