Is this putty good for anything

Well just like the title says. I found this stuff out in the shed and wonderd if it is good for anything. I opened it and it was like the stuff on the left hand side of the second pic. Then i stried it somewhat.

http://img.photobucket.com/albums/v106/Howielong/My%20models/DSC00806.jpg
http://img.photobucket.com/albums/v106/Howielong/My%20models/DSC00807.jpg

looks old, mix it more till it one solid color. Since its a Filler, there should be some kind of hardener w/ it.
Never seen that stuff before.

Yea if it is good for doing small stuff i will mix it more. But it was only that jar of stuff. Its old i do think. My dad got it when he got the camaro or something.