JR thats the thing that I thought was pretty cool about this stuff. The guy that told me about this had used it from day one on his daily driver pickup. he said that they applied it inside the frame-rails and hard to reach places with a extension hose for complete coverage, even the wiring and electrical connections are protected. They drill small access holes in the doors and spray inside the doors and other such places then cap them with a plug. It does have some wicking action to spread and cover everything.
the Closest place to indy where we're at now is in Ohio 190 miles away, will need to make a weekend out of it and see the sights.