a brass brush wont scatch up or dmg your base? it seems a bit harsh?
Can i buy any ol' brash brush from home depot?
Definitely not just any brush from Home Depot. There are brushes specifically designed for tuning skis and snowboards. If you are not willing to spend the money on a brass brush that is made for tuning, a good, cheaper alternative is to use abrasive fiber pads. There are different ones made specifically for tuning, but the green ones that you get at the grocery store in the cleaning section are not a bad alternative, provided they don't come with soap in them. You will want the ones that are just flat, green scrubbies with no sponge attached.
Green scrubbies don't do nearly as well at removing old wax, they will usually be enough for the casual tuner.