I spent almost 10 months looking for a Galaxy Shuttle for my wife. I finally found one, in solid C9.5 box, complete inserts and at a very good price, but, it was not exactly white. It was not yellowed, but then its not white either. It's slightly brownish, like the Japanese seller dropped it in mud and left it there for a few weeks kind of brown.
While I wanted to just get another Galaxy Shuttle (if I could find one), my wife was keen to work on the one we had, sort of like our little project. We spent awhile taking it apart and preparing to soak it in H2O2 (of course, I had lots of fun using my favourite Zippo lighter fluid to remove all the stickers first).
My wife was responsible for disassembling all the difficult parts like the pins that join the arms to the body and the pin that joined the cockpit with the body. I have no idea how she managed to remove those pins.
This is my wife's record of what goes where:
This is the soaking jar:
Photos on Left = parts before soaking.
Photos on Right = parts after soaking for 3 days in 3% H2O2 under very mild sun; and 2 days in 3% H2O2 under intense sun (I placed the jar in my office which is next to Circular Quay and so there is strong sun for most part of the day).
Close up of roof. Can clearly see what the colour is originally supposed to be where the Autobot sticker shape is. As can be seen, the blue painted windows remained undamaged even after soaking.
Close up of the upper legs. The piece on the right has been soaked for a day at 3% H2O2.
Before - After
The final product after reapplying stickers:
CAUTION: The H2O2 damaged the black paint on the cockpit and turned some of it greyish. However, now after 3 weeks, the paint has turned black again!!! (that is unless dirge helped my paint it back while he was reviewing it).