Apply a really thick coat on your first coat. Apply with a brush, not the roller. It's more time consuming, but worth it. Leave for 24 hours to cure. Apply second coat with brush again. Don't forget to keep stirring the paint in the tin.
I've done 5 vans with the stuff and never had any issues applying.
When eventually it starts lifting, which in my limited experience is after about 2 years, wash the area with your hose and a broom to remove the dirt, let it dry, score a section around the area that's lifting with a stanley blade and remove. Then re-coat the whole area again. It bonds to itself even after a good amount of time. You should be fine.
All the best.
