I don't use metal tools for cleaning and scraping out grime and dirt. I prefer coctail picks or bamboo tooth picks. They don't leave any marks or scratches. A bit of spray can oil or sewing machine oil and it's easy to clean out dried up dust and oil. Of you get a very rusty old fixup machine you might think about the dental tools. You could always get them if you like them think they look handy, but I would start with the wooden tooth pick or skewer. A box of cotton swabs is a must for me, and I like those velvety microfiber cloths.