best way to skim a head

Ok were building my friend punto back up, its running 400bhp and tripple NOS sysystem with twin turbos. Now he is asking me the best way to skim a block, I told him to........... Get a metal grinder and do it that way, works really well :)

Anyways back to reality and stop living in people minds haha, my friend is having a engine rebuild on his sporting, but the previous owner said it has already blown up twice :(. Just wondering how many times you can skim a head, I thought 2 pushing it.
Cheers

A couple of times, you usually skim a head to make sure its flat, not because its bannana shaped.

Depends how much has been removed in the past, if its just had a few thou removed before you could have half a dozen goes on it easily.

As Dan says...it depends how much has been removed. My 75 had 2 skims in it's time....each time was only a few thou