Run it forward along the length of the board making sure not to let it cut into the edges.
How to fix a low spot in a wood floor.
High spots and bumps in subfloor.
Water based urethane will dry clear while oil based formulations will impart a slight golden.
Start the saw and lower the blade into the wood.
If you need to bring down your subfloor you can try either a hand plane or a power sander.
If your floor is natural unstained wood then try a few types of floor urethane on your test patch.
Use an underlayment floor leveler or floor patch product to fix low spots in a wood or concrete subfloor.
An underlayment is a thin layer of material sandwiched between two other materials.
It can also serve as a vapor barrier.
If you have a drum sander on hand this can level out any bumps in the subfloor but you need to have a steady hand to control this.