Hi Julie.
You might have lose some money on the Aluminum...
1. Make sure that there are no screws or other metal on the aluminum. ( if you bring 200lb af Aluminum and they see 1 SCREW they will downgrade the whole lot.)
2. there are several different types af AL ( Sheet,cast, Extrusion, Old AL sheet, and a few others.)
3. always separate your Aluminum ie. Clean, painted , cast , ect.ect.