Pipe cutters like the one pictured earlier aren't made for very deep cuts, and aren't all that sharp in comparison to a blade.
A plastic tubing cutter, such as one of these might be a better choice;
I have a low-end plastic handled one sold for cutting PEX pipe, I've never investigated how sharp the blade is, but it's obviously pretty sharp. It can take off wafer thin slices of the plastic pipe.
The blade is a little thicker than a typical mat cutter blade, maybe twice the thickness or so of an Exacto #11. I don't think it would be very difficult to sharpen more, if needed.
They are available at the big box home centers and any decent hardware store.
Last edited by bdial; 03-25-2012 at 07:05 AM. Click to view previous post history.