My Acebeam K60 was the first model that came out of the gate and therefore its bezel has no thread provision for mounting the Filter that came out later in production, along with the new bezel that has an inside thread to mount the male-threaded filter, as can be seen in the photos below.
I don’t have any modder’s tool to remove the original bezel. I tried by hand and can’t move a hair-width.
Can somebody here teach me how to remove the original bezel without scratching the bezel nor the light’s head?
I’ve used a piece of rubber (a shoe sole in my case) pressing the bezel firmly against it and rotating the light
I don’t know if this is going to work for you, but it’s cheap to try
For crenulated bezels I usually use gloves with rubber coating, or when I want to tighten something up.
For smooth bezels I use insulation foam that is used under laminate flooring boards, works OK, in case
that bezel is glued you will have to use torch/heat as well.
More or less recently I've had quite a success removing ThorFire TA13 bezels by submerging the upside down flashlight head in a couple fingers of white spirit. The stuff penetatres so well that in less than a day of spirit bath the o-ring between the bezel and the lens had slipped out by itself into the liquid with my second unit (two units modded). White spirit/gasoline can probably dissolve any sort of binding glue.