Rick - the chemical guys gel is pretty good stuff, although no better than Meg's Endurance, and suffers the same problem that sling is possible (as is the case with all gels). To avoid this, you need to use a water based product like the AG dressing, or Poorboy's. With wheels like Super T's (look great but are indeed a massive pain to clean...) spend a while the first time putting on a few layers of the wheel sealant; it makes future cleaning much easier.

Wonder Wheels is very effective, although quite harsh, so care should be taken. Once the wheels are properly clean, providing they are cared for, you should never need to use a product like this again

Gareth