Has anyone seen this!!! (whitening yellowed plastics)

[kup]

Absolutely magnificent.

Questions:

- The screws on dogfight? Were they 'de-rerusted' by the chemical? or were they new screws from a junker.

- Is the reaction more efficient in an air-tight environment. i.e. closed-lid jar or open-lid jar.

- Recyclibility of the chemical?

Answers:

- The screws do indeed clean a bit but its hardly perfect, they still look worn and discolored so I had to sand the rust off and paint them silver. I have not seen any negative reaction in practice but theoretically, the Hydrogen Peroxide is very corrosive to metal.

- I have not tested this however the biggest factor to how quickly something de-yellows appears to be direct sunlight. The longer its in the Jar with Sunlight the quicker it de-yellows but I am not sure if maintaining an open jar will make any difference. Keep in mind that the liquid does heat up a bit due to the sun and evaporates and condenses within the jar. Having a closed lid would be best to maintain the volume of liquid for future reuse and avoid possible toxic vapor.

- I have used the same liquid for all of Dogfight's parts. At first I started out with putting them all at once but that had limited impact because some parts shaded others from the sun as well as the Peroxide sold locally being a much lesser concentration than what the Americans can get (Thanks to The_Damned for the tip ). Due to this, I did a couple of parts at a time for a day or two each (depending on avaliable sunlight). I have been using the same liquid this whole time and its equally effective despite several reuses. I have now moved on to fixing yellowed Galvatron parts using the same liquid with great success despite several reuses over more than a week.

[kup]

Note on the 'before' pics since the Camera flash masks a lot of the discoloration:

- The light blue on the body and tailfin was actually a light creamy green
- The dark blue was a very dark green (almost army), particualrly the legs and front back of jet.

The after pics are pretty accurate however.

[liegeprime]

Here's an update on Megs and Shockwave. When they first arrived - Megs is really dissapointingly yellow and Shock is like grey.

Before


After

Megs came out pretty good, although his left arm and head still needs a bit of soaking , meh i can live with it for now.

Shockwave isnt as purple as he used to be yet, but I didnt wanna overdo it so I just took him out after a day in soaking.
note: photo's taken without flash

here's what megs looked like when in the bottle

Id prolly be looking for a bigger bottle since my bottle wont fit Hungurr, preferably with a glass lid as well so that there be no shadows castneeding more time in the soaking solution.

[kup]

That's fantastic results Liege!

I particularly like how your Action Master 'Shakwave' turned back to 'Shockwave!'

I pulled my toys apart before placing them in, that way I don't have to soak parts that I don't have to and can concentrate on a piece at a time. It seems that the more pieces the slower the process and the side that faces the sun, is also the more succesful. Because I am now doing a piece or two at a time, the Jar is more than enough even for large toys such as Galvatron.

[GoktimusPrime]

Would need to fill a bath tub to soak Fortress Maximus.

[kup]

Would need to fill a bath tub to soak Fortress Maximus.

Not if you disassemble him

[liegeprime]

Not if you disassemble him

Uhm no! Thank goodness my Brave Max isnt yellowing. Id hate to do that, plus the fact that I wont be able to put it back the way it was. Im still sticking to my plan of a wider jar for Hungurr as im soaking him ... whole, couldnt be bothered to dismantle him