finish and paint bottom before bodywork?

[slimjim]

My approach was more or less the same as Rduke. The one exception was that I raptor lined the interior floor panel before bodywork. It is next to impossible to get it as clean as it was when it was first done thanks to the filler/poly dust. I suspect the same would happen to the underbody if you raptor lined(or similar) before the weeks/months of making things dusty.