Have a custom log home built in 75…eastern white pine, stacked logs (round inside/out). Logs were left extremely rough: extended knots with bark and a lot of skin left behind. Logs are now almost black and I’m trying to create a lighter, smooth surface to the INTERIOR. Using chainsaw to cut nubs. Using razorknife to remove bark and skin (lots of insect damage just below surface ). Using Permachink Energyseal for chinking. MY QUESTIONS: Using a 5” makita disc grinder/sander…and I’m chewin