Don't throw away your star dresser. I have a couple of diamond
dressers and a couple of star dressers. The star dressers get used
more often than the diamond ones. The diamond ones are great for
trueing up a wheel, but dull the wheel. The star dressers open up the
grain so the wheel cuts faster and cooler, but are not so great for
trueing.

I like a 36 for coarse and a 80 or 100 for fine. Plus a wire brush
sometimes.

Dan