Guys whom which have used this product please give some insight. i would like to know how flexible it is. I am planning on putting it on a 13' Gheenoe and dont want to waste my time. I cross alot of stumps and logs and the bottom flexes alot, but its designed to do that. Will either of those products work? Im worried it will chip off.

have a buddy who put it on his bowfishing rig its ok it will chip off if u hit rocks make sure u scuff the bottom well and get at least 2 to 3 coats for it to last but all in all i changed my mind about using it because he told me he averages around 1 good year of use before reapplying it

he ueses steelflex also he said it last longer

Im not sure there will be an advantage of putting it on a boat like yours. It is light enough where you can just drag it over about anything you want anyways. And you are not going to want to be hitting anything hard enough to really benefit from steelflex. Have you looked into seeing if you can even apply it to a fiberglass boat?