1. Are rubber gloves sufficient to protect my hands from the acid? I was planning to wear my rain boots and cover up my arms and legs.
2. One place I'd like to use this is on the honeysuckle climbing the wire of my fence and possibly along the grass at the bottom of the fence just so we don't have to weedwack along the wire. Is it safe to use on my fence or is it too corrosive?
Here's a photo of the honeysuckle climbing the fence...

3. I'd also use this to kill grass and weeds coming up in a rock garden and in between bricks. Will the solution cause any problems for the rocks or brick?
I know to use the concoction on a sunny warm day without a chance of rain and have used similar solutions, just nothing quite this strong... I'm upping my game!