just finished the intake and exhaust headers. I bought a little container of that stuff called CALYX. So far in this entire restoration that is the most amazing product I have come across!!It's so easy to use and the results are incredible. The headers came out so good I decided to try it on the intake after the acid bath. I don't know how it will hold up but right now they look fantastic! The best thing I found for applying it was an old electric toothbrush (no not mine --- my wifes) the look on her face was priceless when she came out to the garage and saw me working the intake with it. If I've learned anything about this restoration it's that 90% of the work is in cleaning and degeasing the old stuff and only a few minutes to reassemble the piece. Thanks for the help---wes