Hi. I am unskilled and need to tap your collective wisdom. I have been without a real closet in my bedroom for 30 years so it was with much excitement that my boyfriend and I had a professional install a veneer-lined and pine-trimmed closet. We chose to do the finishing ourselves ie. filling nail/screw holes and varathaning. My dear sweet boyfriend (who has very little experience with wood) incorrectly assumed that the closet first needed a thorough sanding with a power tool. It was a "Surprise!" for me. Now the wood is covered in a multitude of chatter marks How do I best tackle the problem of minimizing them? Thank you thank you for any advice!!! (Please bear in mind I am a novice.)