Hey guys, I want to get your opinions on how you would approach a wash on a commercial building with a lot of unsealed/stained decorative L brackets around the perimeter. Went today to test the stain and sure enough, my HW mix takes a lot of the color right out. There’s a good bit of mildew around the buildings so SH will be needed, can’t just clean with a surfactant. When I run into unsealed stained wood beams/posts/etc on residential I usually just have my helper hand clean those areas and do my best to keep my mix away. On this job though, there’s so many (not to mention that it’s 2 1/2 stories and the brackets are on 3 tiers of roofline) that it would be a major PITA to hand clean around each of these or to try to tape them off. I’ve included some photos. Some of the brackets as you can see already have color loss along the lower half due to weathering but not many. I’ve made the POC aware of the issue and they don’t want the cleaning to drastically affect the coloring.
Is there a better way to approach this that I’m not thinking of? Would you just walk away? And for future reference, how do you approach similar issues (albeit on a smaller scale) on residential?