We have a cedar railing around a deck. The railing needs to be sanded prior to applying a water sealer. Two questions:

  1. What is the best grit of sandpaper to use? I read that using too fine of a grit might make it more difficult to seal, but the article did not provide much guidance after that suggestion.

  2. What type of sander should I use? Is a random orbital sander OK, or is there a different preferred type?

Thank you for your input!

  • It really depends on how rough the surface is and the type of sander being used. With a orbital I don't often go very corse because they don't move as far as a belt sander but both will work. 200 grit may work for your needs but you probably don't want to go finer than 400 grit.
    – Ed Beal
    May 29, 2016 at 2:01

1 Answer 1


cedar is soft, grit not critical, I would use 150

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