On Sun, 06 Jul 2008 18:55:49 -0700, David Nebenzahl
wrote:

I've used the stem of an old automobile valve with good results;

If you do this, fit a handle. It's far to easy to slip otherwise - one
way you ding the sscraper, the other way it's your knuckles.

They make special tools ("scraper burnishers") for this, but they're expen$ive.

Mine was cheap. So cheap that it's easier than putting handles on
valves.

The Veritas adjustable angle one is really pretty good.