JB Weld and Ferric?

I have a little non knife project I’m working on for an Xmas present. I forged a Damascus wine cork screw. To attach the screw to the handle I did a square end in square hole with a peened top for mechanical hold. There is still some play of the handle up and down on the shaft, so I plan to JB Weld it on for security and seal up any gaps. I am trying to decide if I should JB weld before or after the ferric etch. Before would keep any acid from getting trapped up in the gaps that will be tricky to neutralize, but I don’t know if the ferric will break down the JB weld?

 

In hindsight I should have ground in a step to give some backing when riveting the top or at least a more aggressive taper. Unfortunately I only put in a very slight taper, which combined with not having a proper vise caused some issues getting everything tight mechanically. I’ll give some thought to the solder option. I did harden it so as not to have the shaft bend or the screw uncoil in use, so I have some concerns about the temper soldering. I know it should be feasible to be ok because many solder on guards, but it’s not a skill I’m well practiced at yet. Thanks guys.