Cleaned old house with 2% solution, then brushed and wiped off the front with gutter grenade to remove the terrible oxidation on this old green vinyl. Looked up and saw this. Sprayed it with 5% solution TWICE, and after ALL of that some of the siding had these drips :
If I walked up to a job like that I’d say the guy missed it and did shoddy work. BUT, I really worked that stuff over, and just can’t figure out what it is. Any suggestions?