Project 7 Apply Wurth StoneGuard to floor pans and undercarriage. The prior owner's body shop did an exemplary job of welding in the Pelly Pans. They used brushable seam sealer around the perimeter which sealed them off well, but was incorrect. There was a paper thin layer of underbody sealant then applied over the top.
I am a big fan of the Wurth brand of Stoneguard as it has the correct texture, is very controllable in application, is paintable and has tough rubbery skin when dried. Grey Stoneguard from worth was the absolute best, unfortunately its gone NLA. Black is the only option today. This will get addressed in 7.1