This is my first attempt at modifying a watch. I took a regular, non-atomic I.C.E.R.C. Gulfman that I recently bought (brand new condition) originally planned to keep it white.
I did not like the way the white jelly looked on me, so I decided to dye it.
I wanted the jelly to look like metal but still retain the translucent look of the resin, so I was going for a matte smoke gray look.
I bought a pack of pearl gray RIT and a pack of teal RIT and mixed equal parts in a pot of hot water. I dipped the resin parts for about 2 minutes and was a little disappointed to find that the resin dyed darker than I expected, and it was mostly gray (not much evidence of the teal). I did the vingegar bath to set the dye and painted the bezel letters white to make them more legible.
I still did not like how it looked (too dark, and no longer as translucent), so I started experimenting with acetone. I found that if the resin parts are submerged in a bath of 100% acetone, the dye starts slowly coming off. I bathed them for about 30 seconds each and the parts started looking how I wanted.
I repainted the letters (I used testors white enamel) and used an acetone soaked Q-tip to wipe off the excess.
I'm pretty happy with how it turned out.
Also, note that the blue text and whale image did NOT come off with the acetone. I was worried they would, but I scrubbed hard with acetone and they still did not come off. If anyone has dyed an I.C.E.R.C. and don't like the color, you might want to try the acetone bath technique. I don't know if you can get it completely back to clear, but you can probably get it pretty close.
Anyhow, here is the before and after: