I'm planning to sand a hardwood floor, restain it and apply a clear coat.
I tried using a random orbital palm sander and a 40 grit sand paper on an inconspicuous location. The sander does remove material, but I am not sure if enough material has been removed for applying a stain.
Is there a rule-of-thumb or a test that I can perform to ensure the quality of the sanding?
Thank you all for your comments. I rented a random orbital sander from a hardware store and these are the results :
What I did :
Used a rented random orbital floor and used 36,60,80 & 100 grit sand papers
Used a floor edger with 36(big mistake) , 60 , 80 , 100 grit
The floor edger ate up a lot of wood. I had to rent a square buffer floor sander and used 60grit and 100 grit papers.
The buffer helped feather out the edge with the rest of the floors. I'm hoping this does not become a big issue when I apply the finish. I'm applying a dark finish.