"Wet-play" is where you apply a very thin coat of a liquid ,in the case of LP's, usually distilled water and a surfactant (detergent) to help (maybe) quiet some surface noise or groove damage. Polyethylene glycol (RV anti-freeze or PEG laxatives) or plain glycerin are other options. Down side: First "wet-play" will collect lots of groove "glop" (dust, etc.) on your stylus, probably to the point you'll have to stop and clean the stylus in every band. You need to keep a VERY thin coat on the record surface to prevent the fluid from wicking up your cantilever into the cartridge. Anything you use will need to be removed with a rinse of distilled water after "wet-playing". In the cleaning/storage Forum I think you'll find some archived topics on "wet-playing". Sometimes, it's very effective, but not always. A realistic concern is the price of your cartridge. If you have a $1000+ cartridge, you might consider the benefits vs: the risks to your cartridge. I probably wouldn't try it with a moving coil cartridge with a non-user replaceable stylus. The chance of moisture (or other fluid) getting into the cartridge and causing damage is real. With a $50 Audio-Technica AT-95E, I'd try it in a heartbeat.
Around here, I can get Mexican LP's, cassettes, CD's, but it's all the "C& W" type Mexican music. I've aways been a sucker for the nice South American acoustic guitar music and the vocal solos, as well as SE Asian music (in the "Western" style). I have a few pre-Castro Cuban records I found at estate sales. It goes from very laid-back and mellow to Congas. One is a female vocalist Carmas Aeillo (SP?) who sang some great love songs.