Will this stripper damage or discolor vinyl siding during either application or removal when working on the adjacent deck surface?

Thank you for taking the time to ask a question. I would suggest tarping the vinyl siding to avoid the cleaners/strippers from discoloring the siding. If you have any other questions, please contact us directly at 1-877-825-7727 or info@cbgbrandreview.com. Sincerely, R.C., Digital Care Team