- Joined
- Feb 18, 2006
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Supagard, Diamond Brite and PermaGuard are all prettty much the same principle with a few differences in the compund. All do a good job in smoothing the microscopic surface of paint and preventing dirt from sticking. Diamond Brite has a 6 year guarantee. The packs also include interior protection e.g Scotchguard type protection for fabric and carpets. I've sold cars that have been Permaguarded but they require an annual revisit to guarantee the process. I have a feeling there's quite a bit of smoke and mirrors to justify the prices.