I usually just use an Ultrasonic cleaner and Maas polish and have achieved great results with these alone. I'm liking the idea of adding Isopropyl Alcohol into the regime - it should (theoretically) work well for dissolving any polish residue as well. I'm going to give it a try on a couple of user grade razors to see how well it works (including a overnight soak).
99% pure Isopropanol ............ my favourite chemical! ....... I go through gallons of it in my print room and garage....... Love the smell and love that it's mild enough not to dissolve everything I spray it on (I have dichloromethane for that ).
Take a razor you've scrubbed to death with an old toothbrush and Fairy Liquid .......... Then give it another scrubbing with the brush using Peak polish (or Autosol ..... but be careful ..... a bit more abrasive) .......... Then another scrub with the Fairy ....... Followed by a nice wash down with the Isopropanol. That absolutely will clear off any last lingering traces of polish residue.
FInish off with a light rub down with a spray of Dunlop #65 Guitar Cleaner and Polish ...... and your razor is photo ready
I find that an overnight soak in Barbicide usually does the trick for me. However, I've only used it once on an aluminium handled Rocket 500 because it stained the handle.
Does anyone know a safe way of cleaning up aluminium handles razors?