Hi Rudy,
Go with a post wax installation no problem but you will need to wipe the area you are putting the badges with spirit wipe or neat alcohol immediately prior to sticking them on and this will remove any traces of wax from the area. You will need to prepair and wax the area after putting tyhe badges on.
If not there will be a layer of wax under the sticky and they may well fall off after a short while!
The adheasive tape on these badges ig generally 3M VHB tape or similar note: this is a pressure sensitive tape and the bond is improved with impact or sustained pressure, so lean on it for a while....