Ok, so finally I got everyrhing together, thanks to Matt (Mahleu) for an idler drive with no arm, plinth etc. 'Plinthed' on four plastic legs, rubber mat cut from a beer towel on top of an old wool mat (so record is at worst touching wool but usually rubber), record weight fashoned from a piece of scrap and prattleys putty. Then a handheld vac with silicone tape over the end and a slit for sucking out the liquid. And does it work? Well Nick Cave and the Bad Seeds seem to think so as did a von Karajan comp which was in a box in a garage for some years. The records are clean as a whistle.
Red mister has croak's RCM fluid in it. Yellow has distilled water, I use a natural bristle paint brush to loosen everything and do wash and rinse with suction after each, then a dab with microfibre cloth to remove any remaining liquid then an air dry before playing (just pop them propped up against a cushion).