Wow the pinside thread moonbus linked is a marathon but interesting - Clay says no wax was a surprise. There is no mention (2000+ posts) of foam cleaners but I see people using it on here as part of a deep clean/shop out (mainly newer titles?). The shop that stoptap linked has a branch in my town so I'll get some to try.
@Tombyrne I'm in a similar boat with a '67 EM playfield that I want to deep clean (also my 80s Bally SS's). Certainly Naptha appears to be the liquid of choice ahead of IPA on older pf's. Where are you getting that from in the UK?
This is where I'm at with my pf, basically gave it the odd Novus 2 and Mr Sheen (slap wrist) wipe down so I can play test it whilst fixing it up - it's getting quite shiny already
View attachment 50398
The micro vaccum kit is a no-brainer - £4-6 options on Amazon and ebay
or this set for £1.99 delivered for the uber cost conscious
http://www.ebay.co.uk/itm/9-Nozzle-...or-32-35-Caliber-Accessories-JX-/142344389212