田宮塑膠板 0.05mm B4（4 張）（69948）

It cuts cleanly with ordinary scissors and still holds a crease like paper, but it's tough enough to cement into place without tearing. The 0.05mm thickness

I used this to build a curved heat shield on a 1/24 engine bay and it bent around the exhaust manifold without cracking. The 0.05mm thickness is thin enough to feather into the bodywork, though you do need to scuff it before paint or it beads up. Four B4 sheets went way further than I expected.

Cutting this with regular scissors was way easier than I expected for something this thin, and it bends around curved panels without cracking. I've been using it to close up gaps on interior details and it takes paint fine once cemented in place. Four B4 sheets go further than I thought they would.