I don't use the 320 ppm gel capped externally on myself or on surfaces mostly because it's somewhat sticky. Sticky surfaces collect dirt and anything airborne. On the skin it tugs on the hair which is annoying. Not saying it doesn't work because I believe it would. Just don't like the stickiness. Once I get moved I'm going to have to try the cinnamon capping.
I agree that gelatin capping is too strong for topical use. I prefer using citrate capped or AloƩ vera capped for topical use. Citrate especially is widely used in research, for instance, subcutaneous injections to treat skin and breast cancers.