I have two New Vaqueros, .357 and .45LC. I too had issues with the pointy checkering on these and did the grip mod. I started with steel wool but it kept snagging so I went with crocus cloth and water and the end result was a very comfortable set of grips that have a nicely aged appearance. Care must be used and frequent testing is necessary. You can't replace material once it's off.
The stock grips are a bit small for my hand and at some point I'll find some rosewood replacements. But for now the stock grips are doing a good job.