Quoted from cougtv:Is millwax no good? I use it on my non cleared pfields and it seems to work. Carnuba on the cleared stuff.
Millwax is fine for cleaning EM playfields (at least original playfields; can't vouch for cleared ones). Follow it with a couple coats of carnauba wax too if you like.
(For those new to the hobby, various potions and elixirs for cleaning and waxing playfields have been the subject of much debate for the last couple decades, Millwax being one of them. Some folks swear by it, others won't touch it. Novus 2 is a popular choice for cleaning also. Either one gets followed by a dedicated wax though, usually a carnauba or something like Johnson's. Personally, I've never had Millwax do any harm to a playfield, nor carnauba wax for that matter, in the course of nearly 20 years. So far.)