Here's my Type 2 IJN Amphibious Tank I recently brought to the meeting. This kit is outstanding with just a few parts, but it includes individual track links and wire for the pontoon release mechanism. I finished it in a single green color. To break up the monolithic tone, I airbrushed random areas of each panel with a lighter shade of green. I added the chain (that wasn't in the kit) and weathered the model with oils. I used Tamiya smoke for the exhaust stains. Enjoy!
The operational plan is for the tank to swim to shore, where upon reaching the beach, the commander moves a lever to release the fore and aft pontoons. It is interesting to me that the fore pontoon blocks the use of the bow machine gun when attached.
Here's a nice reference for the actual vehicle: https://en.wikipedia.org/wiki/Type_2_Ka-Mi
This is just another step in my quest to be good at weathering armored vehicles.