The iron found in galvanized fasteners as well as some window screens and flashings can cause blue or black stains on cedar.
How to remove old stain from cedar siding.
Many of these products come in cans or bottles much like paint.
Sand the wood until all the finish coating is removed and the natural grain is fully revealed.
Remove the existing finish with a power sander and 220 grit sandpaper.
Shingle siding house with massive paint failure.
Cover cedar siding with primer to keep any tannic acid or natural red coloring from.
Sand it to remove the loose surface particles.
Follow all product instructions regarding the amount to use and the proper time to wait.
Apply the stripper to the siding with a paintbrush or spray it on if it comes in a spray bottle.
Work in small circular motions to remove the protective finish.
Apply paint stripper to the cedar siding.
Prep the cedar siding by cleaning it with a bleach and solution.
Mix the cleaner according to the instruction and apply it to the stained cedar siding with a brush or roller.
Instead use a wood.
Peeling paint was removed by cross scraping with carbide hand scrapers then stripped to bare wood with port.
For high areas use an extension on the roller or climb a ladder and use your paintbrush.