Thats a great looking panzer 3,If you had not said that all you had done was weather it I would have thought you had resprayed the whole tank.The weathering has transformed it completely.
I have the asiatam metal hull for my Stug 3,can't recommend it enough.The suspension works exceptionaly well,adds a nice bit of weight to it too.
I'd recommend buying the hull with the wheels as a complete set.Mine came with brass axles and bushes on the road wheels held in the arms with grub screws,I'm not sure it's the same when you buy the hull and wheels seperately as the seperate wheel set is designed to also fit the plastic hull and arms.
Don't quote me on that though.

Have fun.
Steve.