well unfortunately i am not very pleased with the results pictures don't lie and these pictures i feel show that they both the treated and untreated strap dry rotted equally. however, i am also positive these are not the greatest quality straps out there considering i bought them at a flea market. i would not be opposed to trying it again if i ever buy top of the line straps and i wont be opposed to spraying down any i might strap to the trucks during the winter since a fresh coat should keep the snow/ice from sticking
You're probably on to something regarding the quality of the straps. I recently purchased a similar strap at Home Depot, and it was made in the USA! I was shocked that such an item would be sold at Home Depot and would be made here. Maybe you can recreate the experiment with those.