Unless you have access to a large battery, a tank of the correct acid and a lot of luck, leave it to the proffesionals. If you get it wrong, your prized bits of aluminium have a nasty tendancy to dissappear into the acid. If you get it really wrong, the whole lots goes BANG, and it's time to redecorate the place. Plus the fact, if the pro screws up, it ain't your fault.