Can’t tell real well from Pic but efflo will work if that’s what it is. But in all honesty, you should have done it first, before all the siding work. At this stage, I would almost pass on it and I don’t say that often. Now it’s going to be a HUGE PITA.
The customer didn’t request to have that area cleaned. I was just thinking of it as a learning experience. I didn’t attempt it. However, here is a picture of an area on a different job I treated with F9 efflo, NMD 80, and as a last resort, I tried Aluminum Brightener. Picture on the right is after… next to no difference. I am going to try a product from Glen Gary Masonry to see if i get any results that way. Any thoughts?
That’s an area that has been pointed up. Surprised the NDM80 didn’t work if you followed directions, it’s made for that. Would probably take 2 applications as bad as it is.
