Will overspray from a 50% bleach solution when cleaning siding cause discoloration if removed promptly?

Hello, and thank you for reaching out to Trex. For cleaning Trex recommends to not use any non-recommended cleaners with Trex decking including bleach. However some scenarios are difficult to avoid so we do have some recommendations to help avoid any issues. When cleaning surrounding materials near the deck with non recommended cleaners Trex recommends to wet the deck very thoroughly prior to cleaning. This is beneficial as bleach landing on a wet deck is better than bleach landing on a dry deck. Then once completed Trex also recommends to rinse the deck very thoroughly to remove any substances that may have gotten onto the deck. I hope this helps answer your question. Thanks, Tori - Trex Customer Care Team