hey all good stuff, i will throw in however that indeed you must test always in inconspicous areas and also this 'isocol'...it really should be 100 % isopropal alcohol,, the medi lotion MAY have other ingredients that could pose long term issues with residue. if pure then this is brilliant as usually iso is in quantities that take 10 years to use 

Really hard to find 100% isolprophyl - even the pharmacies only stock 92%. Bunnings has 100% (I think) but it is only in small bottles.

I've used Isocol for 6 - 7 years without issue. Golden rule is to test an inconspicuous area, and never apply it direct to the playfield.