Immersion oil has gotten all over the body of our Nikon Eclipse Ts2R and it won't come off. Lens cleaner takes care of the objective lens, but the rest of the knobs/base/etc. is tacky, dirty, and covered in oil.
Please try something less aggressive and simple first. It is an oil so just wipe it down with 91% IPA . Follow this with a clean, dry microfiber cloth to remove any residue. Works fine and less likely to remove all the paint and finish!