Originally posted by: SOTZA I used water ( H2O ) ....with one oxygen atom added it is called hydrogen peroxide ( H2O2 ). Cheap ,easy to find and use. Google "retrobright". The results: 1982 National Way RQ-WJ1 Aiwa HS SP-500 Cross Trainer Toshiba T-1600 Panasonic AG-7700
Reply by Sotza: Thanks WM-W800, I can not advice I'm not an expert I was only experimenting maybe I was just lucky or maybe there are hidden problems but any info on how it is done is all out there. I can tell you though that hydrogen peroxide does not affect lettering (my experience so far) BUT AFFECTS I think chrome plating on plastic parts and colored plastics (giving a whitish shade on red and black) which in any case do not need unyellowing so good masking to these areas is strongly suggested. It also seems paint is not affected (blue on the AIWA Cross Trainer). At this stage I prefer to share what to be careful rather than what to do. Although I'm very pleased with the results still think is risky business . I suggest that you experiment a bit with something else before attempting anything to the beautiful and valuable Sony ps-f5. Hydrogen peroxide is used for coloring hair (or decoloring, really don't know ), very common stuff, I used this one:
Hi Mankamz ! Can't see the photos on the forum, but found others on the internet, very good result, ideal for any plastic piece of junk from the 80s. It also appears that it does not affect the surface like other chemical (white spirit, acetone*, etc). I need to test it. Do you think it also works on transparent plastic ? Don't forget to by gloves, hydrogen peroxide can be a little corrosive on organics entities, such as fingers, skin, eyes... *Not sure these words got traduction or not, sorry...
Bit late to the party on this one, but...would Retrobright work on coloured plastics? I ask as to date i've only seen it used on white or cream computer casings etc. Would love to restore my Blue WM-75 as it's clearly faded.
A good question. I have seen quite a few things where inside of the battery cover etc is a different colour to the outside. Googling found me https://assemblergames.com/threads/...-than-grey-white-well-say-dark-colours.46382/ I think the main conclusion is not to overdo things or your coloured plastic might end up white.
Thanks for this. Very interesting. Must have missed that site first time around. Be great to find a totally trashed WM-75 for pennies to experiment with. I may grow a pair during the next few weeks and have a punt at doing my '75. After my new testes are run in they'll be handy should I decide to pony up for a B&W service for my venerable - if vulnerable - CR-7.
