Hi Mike, The JB Weld will look pretty thick, but it flows out as it cures. I would probably paint it on using a flat toothpick and juct carefully control the amount you put on. If in doubt, try mixing some up and test it on something else. It's good tough stuff and I know of absolutely no other epoxy that is as strong and fuel proof like that stuff..
It could be called Liquid Duct Tape - it is that good!