I recommend a very fine grain, pass it on so very light and see what result you get, if I did not use a bigger results, so you should be able to get a clean and without bumps.
Originally Posted by MJStephens
Hey, thanks for the advice. What type of dremel attachent would you suggest for use on a shore A hardness 40 uretrhane rubber? For the pipes, I have urethane resin. I'll get some close up shots ofthe mask and get them posted a little later today.