Wheel arches........ What are peoples thoughts on painting the underside of these, good practice, not recommended etc etc, any thoughts would be appreciated. If it is a good idea what would you use...?

Cheers Guy's

I suppose it depends on what you are going to use.
Most people do use an underseal to try and reduce the cracking that can be caused by stones rattling round in them.

Im painting the underside of mine with that rubbery stone chip guard stuff.

ditto with the stone chip protect on the inside of the arches

I'll be putting underseal under mine.