That was my first suggestion!
It sounds like you already mounted the stockers. If that is the case, just be careful with over-spray on your wheels. Westleys can damage wheels if you let it sit too long.
You said you have tried a lot. Degreasers [diluted appropriately] can do wonders at removing the greasy film from tires, and then Westleys Bleche White should be able to bring the white back to life.
So when you try your next product, if it's westleys [over the counter too!]
- make sure the wheels/tires/brakes and cool. If you overspray onto hot brakes, it creates gases that are very unsafe to breath.
- Don't spray onto your wheels, and if you do, remove the overspray with soap before it dries.