SDCC Sargeant Slaughter with the vintage Triple T tank.
The Triple T Tank was actually starting to show signs of yellowing (particularly stress marks where the toy either was stored or hit before, I’m not the original owner, I bought this off Ebay). Fortunately, the old “Hydrogen Peroxide solution immersion under sunlight” trick worked and cleaned everything! The yellow turned white overnight! I had to order stickers from Cobrastickers.com to replace the faded stickers as well. The whole thing looks like it came out of the Hasbro factory just yesterday.
This peg and some other parts were super yellow before the immersion: