For anyone interested you can get a comparision study we had done of 25 paint sealants and waxes used by detailers all over the USA and Canada, "Comparative Study of Automotive Paint Sealants and Waxes."
The study tested the products for three things:
1. Before and After application to measure reflective shine increase using a Glossometer.
2. Percentage of reflective gloss loss after 12 washings using a Glossometer
3. Corrosion resistence - the test model was salt water which is one of the worst elements to destroy wax/sealant protection.
Contact Sharie to request your copy: [Commercial links or emails are not allowed on MOL. Please refer to the Forum Rules; Thanks, 2hotford]