hi just incase anyone is thinking tentatively about whitening amiga equipment ...i gave it a go today ...used bblonde 12% peroxide hair blonde stuff from boots ..(bout 1.65 ish ) 3 hours in great sun 1 hr in overcast took out marker pen and minor marks , also soaped and rinsed the keys and cleaned the whole top half and the trapdoor unit ..( not confident bout stripping completely to do base ) results are awesome its like i unboxed it brand new today ...so proud , couldnt believe how simple/available the product was