Paste wax is a well proven option. I'd suggest you stick with it. If you have to buy some then don't despair. It lasts for decades in the tin and comes in handy for a lot of other uses in home repairs or just for buffing up oil finished stocks to a nice warm sheen. Heck, you can even use it to polish furniture and floors! ! ! !
Yeah, yeah, I know I'm a jokster
DItto on the advice to check the fit as noted by SAA above. The hole may well be a great fit to the pin but it's not quite in the exact right place. You may need to chew it out a little to allow the upper corner of the grips to move fully into the corner of the frame for that perfect fit.
My only other advice is related to how long to wait with the epoxy. If you're using the 5 minute stuff, which would work just fine, you'll want to wait until the excess glue left on the mixing board is fully hard but still will dent from moderate fingernail pressure. The excess on the mixing board will cure slightly faster than the glue in the hole because of the bigger mass of glue and not being in contact with metal that pulls away the heat. Epoxy generates heat as it cures so a bigger mass will cure faster. And if you have to err one way or the other it's best to err on the side of the glue in the hole being too hard than too soft. If too soft it'll just tear out and you need to start over. If too hard it may try to pull out the pin but if that happens you can just grab the pin with some pliers and with a twist and pull it'll come out.
One last thing. Don't try to mix up too small a batch or you can run into troubles with the glue portions being mismatched. If epoxy isn't mixed to the exact ratio it won't cure properly. So with 5 minute getting very nearly even amounts is important. Even though you only need a tiny dab you'll want to dispense two 1/2 to 3/4 inch long identical "worms" of glue from the tubes or bottles for mixing. I know it seems like a waste but it's the "cost" of getting the mixture correct.
And as noted by Old Fuff be sure to only do one panel at a time since you'll need to tap the panel loose from through the frame. Do both at once and you'll likely do a lot of damage to the wood panels prying them off the pins.