Restoring discoloured plastic on a Tascam Portastudio ... First attempt! 

Here is a diary I kept as I made my first foray into "retrobriting" - the process of lightening plastics which have become dull, discoloured or stained due to exposure to sunlight, tobacco smoke, etc.
In the video I'm likghtening the pale grey plastic knobs and buttons from a Tascam Portastudio 424 Mk III by submerging them in peroxide in a transparent plastic container, then leaving the container in a windowsill so the UV ciontent of ordinary sunlight will react with the peroxide to bleach out the staining of the plastic's surface.
I have seen poeple paint a thinner layer of peroxide onto stained plastics, cover the palstic with cling film and use a UV lamp of the sort used to cure nail varnish. ..You might prefer to use those methods depening on the size of the plastic you're working with. Clearly you'd need a huge container, windowsill, and a lot more perroxide to treat an entire portastudio case the way I'm doing it!
Please note that you should probably have protecticve gloves on and clingfilm down on your working surface when you work with peroxide, since it does produce a mild chemical burn in direct contact with your skin. In my case it was onyl slightly uncomfrotable and dissapeared within 24 hours, but other skin types may react differently, and even if your skin is more resilient to this chemical, I reckon its worth avoiding!
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