just a question that popped up

What material is R2-D2 made of?

Matter.

who knows? perhaps old collected space junk.

Some of that junk i coughed up a few millenia ago

his outer shell is a composite material comsisting primarily of Reantarium Toonexis ( outer shell) and Denarium Toonexis ( inner sheel accessories + electronics sensors etc....) I'm not sure where he was built though

I thought R2 was plasteel. Where did you get this information spekdah?