I have a number of estate pipes. If it is beat up or has a crudy/flaking finish or doesnt show the grain very well I will sometimes sand the finish off of everything except the nomenclature and down to 2000 grit sand paper starting at 600. It leaves a supersmooth finish on the smooth pipes that I find appealing. Now assuming I am not trying to sell these pipes, most of them are far south of $20 bucks in purchase price for me, is there any problems doing this? I like the feel and allows me to see the grain that is often covered up by dark stain.