Tinbucket......go for it ! I have done crosshatching and decorating for years on the spines of knives and done all kinds of stuff like that using a Dremel. One thing that has made it a lot more successful for me is using one of the magnifying headbands. Get lots of light on your project and using the magnifier, you can get down close to your work and see with much more precision as you work. Using a little cratex wheel on your Dremel, you should be able to remove a parting line with no problem, but you might have to do a little polishing to match up the finish around that area afterward. Do a little playing with a narrow cutting wheel on your Dremel, using some scrap material, and you'll be surprised what you can do.