How To Restore 300 Year Old Oak Beams At My Old French Farmhouse Using A Grinder, Sweat Equity

Here I am using my Makita mini grinder to remove 300 years of dirt, dust and all sorts of collective debri from my old oak beams which support the upper leve of my farmhouse. This room eventually will be another lounge area within the farmhouse making 2 nice liveable fully restored rooms with eventually a large bedroom above. I used numerous types of abrasive disks although I found the carborundum steel disk to be the most cost effective and best for this particular job.