Sand it to remove the loose surface particles.
How to remove old stain from cedar siding.
The iron found in galvanized fasteners as well as some window screens and flashings can cause blue or black stains on cedar.
Shingle siding house with massive paint failure.
These stains don t respond to oxygen bleach.
Prep the cedar siding by cleaning it with a bleach and solution.
The surface of the cedar should be smooth to the touch.
Sand the wood until all the finish coating is removed and the natural grain is fully revealed.
You ll want to leave the cleaner on for at least 15 minutes up to 30 minutes to ensure that it removes the old coating.
Apply paint stripper to the cedar siding.
Work in small circular motions to remove the protective finish.
Mix the cleaner according to the instruction and apply it to the stained cedar siding with a brush or roller.
Instead use a wood.
Follow all product instructions regarding the amount to use and the proper time to wait.
Remove the existing finish with a power sander and 220 grit sandpaper.
Cover cedar siding with primer to keep any tannic acid or natural red coloring from.
For high areas use an extension on the roller or climb a ladder and use your paintbrush.