Can I use your waxoyl kit to to the underside of my Mini Cooper? I want to do the whole underside and the complete inside floor, any idea of how much I would need?
The kit, part number WAXOYL is available from Mini Mania and it should contain more than enough to do what you want. I suggest you do the underside first and then see how it looks and feels. You may not want to cover the inside floor.
A good place for the Waxoyl is inside the sills. This may require drilling an access hole.