Remember what reflectors and lenses were mentioned wished to be cleaned.
Colortran went out of business as a name brand long before the use of
dichroic glass reflectors came into fashion.
ETC,
ETC,
ETC... anyone check the recommended maintinence from other companies say similar to what type of
fixture is inended to be cleaned? Windex - sure... residue, try cleaning after the soap with
denatured alcohol so as to clean off any residue from the soap left behind once it it clean?
Here is what I recommend as able to do the best and least labor intensive job of cleaning both
lens and
reflector if not
dichroic coated.
Throw them in the dishwasher. Ensure the Jet Dry adder is full and or better yet put them into the school's kitchen dish washer for a better job yet. Simple and done.
Denatured alcohol, or Isyopropyl alcohol work with a lint free rag to remove only what can be lifted off the surface by them as a
vehicle, otherwise it like water also a
vehicle just smears about and removes some but more makes mud until it drys and does little or at best some if not making it worse. They are vehicles only and not soap which lifts dirt from a surface allowing them to be whiped away. First the soap, than the
vehicle to wipe away any soap residue. Vineager also works with time to lift off and clean lenses but is less needed often to be used.
MAAS metal polish also does wonders for aluminum reflectors but so too might something like "Dip It" - if it polishes and doesn't have Pumice in it to scratch as it cleans, it will probably shine it up some. Heck, with the proper buffing compounds and wheels could probably buff both lenses and reflectors. Lots of way to polish aluminum as if cleaning silver. Lots of ways to clean glass when un-coated these probably are not. Use Windex at work, I prefer purple Sparkle at home and always remove the residue with alcohol.
Anyway, while doing your
lens/
reflector cleaning, make sure you inspect lamp sockets to be shiny and not blackened pitted or arched/welded, wiring, bolts, paint
etc. as this project might grow a
bit in noting stuff in need of repair or replacement. Euro PATT (think it's called) a good thing. Also do a proper
bench focus of the equipment once re-assembled. Proper
bench focus of the fixtures would probably equal the output you get to the clean lenses.