The pushers unscrew from inside the case, so the movement has to be removed to access them. You will see the thread for both pushers from inside: takes a 1.4/1.6mm screwdriver, unscrews counter-clockwise.
3 caveats
1) remove crown for A7750 in winding position (other positions you will probably jam the keyless works)
2) notice that one of the pushers is beveled. You need to re-install it in its original position.
3) Do not overheat your dye while these rubber parts are in the dye, otherwise you will melt the rubber. Better to use longer dying time than higher heat.