Commodore Plus/4 bleached yellow keyboard

I changed my retrobright method a bit. So far I have washed the keys in a net in a machine machine. Unfortunately, this then damaged the lettering that was only printed on the front. Then I bleached the buttons loosely in a zipper bag with chlorine dioxide gel in the sun. Today in this video I just hand cleaned the buttons with soap and then with isopropanol. For the subsequent bleaching, I 3D printed a frame to improve the alignment to the sun. In this video, I've tried it out on my brother's Plus4 keyboard.
My channel is about retrocomputing. Especially with the 264 models from Commodore.
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