Just thought I would share my most recent project. I would like feedback on my techniques if anyone has anything to add. This raised platform was coated with what I believe was Behr Deck over finish that was badly deteriorated. There were also areas where boards were completely junk. We replaced 7-8 deck boards with new pressure treated 5/4 x 6” boards and then got the majority of the loose paint off before I started the cleaning process.
For this project, I used Sodium Hydroxide from pressure Tec (F18) at a ratio of 8 ounces per gallon of water in a 5 gallon bucket with a little surfactant. The wood remained wet throughout the duration of the project after initially pre-wetting the sections I was cleaning. After pre wetting the area, I brushed Hydroxide evenly across the surfaces and let dwell 10-15 minutes while misting occasionally to keep wet. After a 10- minute dwell, I scrubbed the area again with a soft brush and continued to let dwell for another 10 minutes or so. The hydroxide lifted the remaining finish nicely. I then utilized a fan tip and pressure washed each board evenly. The stripping process worked great.
After cleaned, I used my X jet to apply oxalic acid at 8 ounces per gallon pulled 2-1 through the X jet. After application and a 5-10 minute dwell, I performed a low pressure rinse of the oxalic acid.
These are my results. I was pretty happy with how everything turned out and thought I would share my process.
Does anyone have recommendations or different strategies for a similar project they may have done?