Monochrome sensor conversion... seeking advise

Confession: The last time I had to do this was 10 years ago.  So maybe dated info.  But this is a no-harm, no foul "better living through chemistry" method that may help.

Acetone, benzene, gasoline, zylene paint thinners will dissolve several of the classes of polymers that microlenses lenses and CFA resist material are made from.  It will not attack the underlying silicon substrate or SiO later that may also have been applied as a hard coating.

You can easily test this.   Make a small disk out of white paper, about the size of a dime.  Place this on the center of the sensor.  A drop at a time, add your [ favorite solvent  name here ] till the paper is saturated, and the solvent is kept in contact with the sensor.  As the solvent evaporates, add another drop to keep is sopping wet.  Whatever keeps the solvent in contact with the surface but not flooding the rest of the sensor.

If you are a Nervous Nelly type or using a smelly solvent like gasoline, or have a twitch, do this OUTSIDE - otherwise it is surely harmful to you, your marriage, your liver, and olfactory facilities.

Keep it "topped off" for a while, like 5-15 minutes.   Then test with the Q-Tip.  The coatings should slough off.    One of these solvents will take care of business.

I don't like the scratching off method as mishaps can occur.  It works, per YouTube.   With chemicals, you can always resort to scratching if they fail.

Just the solvent absorbing into the plastic will make it swell which usually de-laminates it from the substrate.