Turning old rusty hammer into Mjolnir TOOL RESTORATION --- AF invention

I bought the rusty old hammer from a flea market. However it was unusable because the head handle was loose. I'm not sure how old it is or if it is antique. I decided to cast a new handle from aluminum and polish the head up. The hammer head had some rust and a lot of cement or plaster (I'm not sure of the correct word).