I wanted to re-stain my wood deck but thought it would take days and days to remove the algae (we live in Terrace ) and grime . WOW Clean floors came and removed all excess paint and algae and grime in less than 2 hours and we have a large deck. Looks 100% better now and am ready to stain the deck. I am so relieved that I saved many hours scrubbing and was also happy that no chemicals were used in this process. I would definitely suggest using this company before you want to re-stain or re-paint your deck. Absolutely worth it.