Prop Cages/Guards?

[hellosailor]

Wheels, MarineTex is the brand of epoxy "paste" sold pretty much universally in chadleries in the US. A small pot of goo about the thickness of peanut butter and a small bottle of hardener, sold in black/white/gray IIRC. It isn't a putty. JB Weld is another brand sold in automotive stores (two tubes, each like toothpaste, final product gray) and PC-7 is a true paste sold in two small tins (35mm film cans, one fluffy the other like tar) in hardware chains.

The stuff that comes in rolls, with one part in the center and the other wrapped around it, is called "plumbers epoxy" in the US. Sold in plumbing and hardware stores under many brand names and used among other things by plumbers to seal small leaks. Any and all of those brand names forms a permanent repair, I've got an old soldering gun repaired with PC-7 30++ years ago, no sign of it failing yet.

[ssullivan]

Another issue here will be if I can even remove the bolts without a 2nd person to hold the head of the bolt inside the boat while I work the nut outside. If it rotates, I'm going to just have to hacksaw them off.

May be easier anyway... no need to go searching for Marine-Tex (which is just like hellosailor described).

[Charlie]

I had that problem with my deck hull bolts when I was up working on my boat. Take a pair of vise grips and put the on the side of the boat where the V-grips will hit something and stop them from spinning. A bit of a PITA since you have to run around and get to both sides of the boat but doable. On one bolt I had to attach a long piece of wood to the vise grip to get it to hit something. Yeah now that I remeber it a moajor PITA. Good luck with it.