Originally Posted by MichaelG

Cheers for the comments guys,

As regards to the underseal on the car, theres two ways, you can either rub it down completely to the bare metal with a wire wheel etc, but it takes AGES then paint it....or you can use thinners etc, and rub it down to clean the underseal surface, and paint on top of that.

Doing it the second way still leaves the car looking as though it left the factory with the paint forming over the shape and contour of the underseal etc

I have seen it done both ways.