yeah its the leg of a tallgeese, i was looking through some old beginner type kits 1/144 and remember that a friend bought me a talgeese I and II which was actually the same exact kit, with the other having a extra head so its pretty much a white talgeese II which was most disappointing actually that Bandai wouldn't even bother molding the blue plastic pieces, and just use the same white talgeese I part and put on a new picture on the box just because it was a cheap beginner type kit.
actually since i have 2, was going to mix the built talgeese with a wing zero, and wing gundam parts, (both wing gundam were broken in multiple areas) to learn using putty and simple mods. (the current idea of how it would look like is quite interesting lol) then i would use the extra talgeese as painting practice. after that i'll work up to SD, HG, HG 1/100 and finally my MG's.
so yeah... I was just coving up the seam with liquid putty on the upper leg part, then as i was gonna put together the lower leg part, it just came to me that the gray plastic joint would get painted as well... but if if i color everything before hand i wouldn't be able to cover up the seam lines.
i just try and tape it and such and see what happens.