I did mine a year ago, and it is holding up great so far(12,000 miles). I
think the most important part of the repair is to get the pits cleaned out.
After disassembling them, I used a cheap sand blaster to clean mine up.  Then
I apllied the JB Weld to the pits.  I just used a sanding block to sand down
the high spots even with the sealing surface of the head.  I think this is a
great way to extend the life of the heads.

Chris
86 Westy