I have tried F-8 on rust stains from the gutters that has dripped down onto the EIFS siding. F-8didnt touch it! I diluted 8oz into a gallon.
Just wondering if anyone else has any experience with this surface and can reccomend what the heck to use. wish I had a pic but I dont.
any ideas?
The gutters seem to look like they are galvanized rather than painted or powder coated.