Beams developed blemishes that are sanded out

It is normal that beams, logs, wood in general can get blemishes, stains, mold, scratches, mud. Weather conditions effect this, as do many other factors,such as how long material stays outdoors, job site conditions, weather, humidity etc..

To deal with the wood I take a hand held power sander and buff out the imperfections as seen with these two photos. Sometimes the stains are too deep and they can not be fully removed, but I do my best.In these cases for the hard to remove stains, chemical bleaches and TSP can be used.