I have a couple of pairs of grips I need to clean the checkering up on. What is the best tool you have found for the purpose? I have a Dem-Bart checkering kit but the spacing doesn't seem right.
"IF" you feel you have the talent to do it yourself, a riffling file, comes with a bent tip, is often used to freshen up checkering. The Dem-Bart checkering tools are good "if" you have the correct one. They come in numerous different spacing's. You need to know what LPI you have on your grips (which change from time to time).
The September/October issue of American Handgunner had a good article on cleaning up and refreshing damaged checkering. It's by Roy Huntington, on the last page of the magazine. He used Dem-Bart tools, but doesn't mention how he determined the correct spacing.
My Dem-Bart (22 LPI) set has 3 single line cutters, coarse, fine, and a short one for tight areas. Single line cutters work fine for cleaning up most checkering.
If you use a single-row pointing tool, you don't need to worry about lines per inch. The teeth are very fine, and only remove the high spots (or grunge) if you use due diligence, keep it straight and don't overrun the ends.
I've successfully (and carefully) used a sharp dental pick to scrape out any "grunge" that's gotten into checkering. Then brush it out with a clean dry paint or acid brush. Sometimes a light top coat of satin or gloss (depending on the finish of the original grips) Tung Oil (which is much thinner than TruOil or some other finishes) is needed to help the cleaned areas blend in better with the old.
This method has worked for me to clean up the checkering, but it won't work to "repoint" any broken diamonds.