Aapply a clear coat to the roof of your vehicle.
Paint roof van.
You don t need to sand the whole van but i would recommend it as it gives the paint something to key to.
Sand down smooth to around a 600 grade finish.
Fill all the little holes and rust spots.
If you ve ever painted dormers or half gables on the outside of a house you know that resting a paint can while working on a rooftop can really be tricky.
Paint the roof of your car using either a brush or a spray gun.
Once the paint goes on all the blemishes will be highlighted and can spoil what would be an otherwise smart van.
Allow the second coat to dry thoroughly.
Create a triangular platform with an angle opposite the roof a bevel gauge and level will show you what the level needs to be.