JB weld for hole size mistakes

kristopher

Well-known member
A while back I used some JB weld (marine grade) to fix a few f$&@ ups I made on two enclosures. I over drilled the holes for the jacks. Oops. And an off center footswitch hole. Damn.
I first taped one side of the holes. Then with a toothpick, I mixed the white goop with the black goop on a piece of scrap cardboard. Then I filled in the holes, and let them dry over night, removed the tape and then sanded them flat. Then I drilled new, appropriately sized holes. And badda-bing, badda-boom.

The stuff feels strong, and sands down easy. These enclosures won’t be sold or traded, probably used for testing stuff out.
Anyway… Just an FYI for those who need to know.
 

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I've used the steelstick and it is good for covering holes but not so great for redrilling. I fixed a mistake and needed to drill right next to hole but the drill bit kept slipping into the jb welded hole.
 
If you have a 3D printer, then hole mistakes are an opportunity for a quick hole adapter print. Simple to design, super quick to print. Just saying...
 
I had better results taping the outside of the enclosure and filling the hole on the enterior side on an enclosure. It's a lot less work than sanding the outside flat again. That was on a pedal where I wasn't redrilling the extra holes and you could still faintly see a little of the circle from the old hole after I painted it with hammertone paint. If I would have redrilled holes in those spots I wouldn't have had any issue with seeing the jb weld edges under the paint.
 
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