Best practices for speaker cabinet care

• @zlone, I've had a pair of black piano lacquer Tidal Piano speakers for more than ten years. When they need more than dusting I dust them first with a new Swifter duster and then use a newly laundered micro-fiber cloth and Mequiar's Instant Detailer. Black lacquer shows every little thing you don't get off and it sometimes takes repeated applications and buffing to get it like a black mirror. Works great on my REL black subs too. FWIW, Steinway pianos says plain water on a micro-fiber cloth works fine for most cleanings of their finish.

Sonus Faber provide this cleaning kit as an option to treat/clean their speakers. I purchased these through my local SF dealer for $50 AUD. It does not seem to be anything magical - clear wood cleaner and a microfiber cloth - and most likely can be acquired at much lower cost.

I’ve used various products and methods over the years for many different non audio products. One of the items I use is Brillianize which is essentially a very light detail polish. It’s fantastic for TV screens, especially plastic. I was introduced to it decades ago for use on my plexiglass aquariums. I have Mcguires and 303 products too, but I prefer the Brillianize as my final coat and it’s fantastic on polished black. I use it on my TT cover and my motorcycle finishes. I no longer use pledge on anything opting for the Brillianize instead. On my old JBL’s every couple years I use a very light coat on lemon oil, not sure on correctness but it helps the stained laminate from drying out. Another thing I do is keep all my micro fiber cloths separate from other fabrics to wash. I do not use any fabric softeners or fabric pads in the cloths washer to clean them as you can introduce scratch creating particles. I live in central California and it’s extremely dusty and came to realize the importance of removing dust prior to any rubbing of anything. Sorry to be off topic from the original question, but just wanted to add something constructive to the conversation. Cheers , Mike B. 

Thanks @photon46, I happen to have some of the Mequiar's and will give it a try if water and microfiber alone are not enough. Will the Mequiar's actually remove scratches, or is it just safe for fine finishes?

My speakers are from 1989, they get Howards wood care on them. They look almost new after all this time. Also use it on most of my vintage MCM furniture. 

Spray on a MF towel, wipe speakers, buff off, done. Do it every couple months.

The bigger question is how do you keep a piano black turntable clean? If I look at it, there is a smug mark, even after I clean it, there is dust. Will never get a piano black TT again!