How do I fix sticky rubber coatings on electronic devices?

I've made attempts to correct this problem a few times before and I think I have finally found the best solution.

# Remove any batteries or electrical connections to the device.

# Using a new, dry paintbrush, aggressively dust the rubber surface to remove any lint or loose dirt.

# Mix a few drops of dishwashing liquid with water, dip the brush, shake off excess water, and aggressively clean the rubber. Orient so that gravity helps drain moisture from any seams or openings with jacks, buttons etc. This will require many dips in the solution because you want to use as little water as possible. Allow to dry.

# If dirt or oils remain, dip a lint-free cloth into the solution and lightly rub to clean.

# Allow to fully dry; ideally in direct sunlight. Once dry, reinstall batteries to test for proper operation. Remove batteries.

# Repeat step 2 with a dry paintbrush. Step 3 if needed. Allow to fully dry.

1. Prepare to paint. Using painters' tape, cut small rectangles and cover any lettering or labels that should be protected. Plug any jacks or holes and tape any threads that are likely electrically grounded.
2. Using clear spray shellac, paint the device and allow to dry. Apply 2 more coats. Depress buttons between coats to verify they aren't painted stuck. If you like the gloss finish, then you're done.
3. If you prefer matte finish or if imperfections are amplified by gloss, use light coats of a clear matte spray. Using caution around buttons, one or two light coats should do it.
4. Remove tape and enjoy.