Aluminium is the easiest by far - but look how grubby that stuff is! Eewwwww!
Silverplated trays can be quite hard to chop up by hand - you never really know what they are under that plating ....
Old copper and brass planters are wonderful and whilst I adore that green patina, it is notoriously unstable so I usually have to remove it before I start and then work a little alchemy if I want it back on the finished article! Getting reclaimed metal clean can be pretty labour intensive and I have a bunch of 'weapons' in my cleaning arsenal.
I used a mandrel designed for a buffing thingo to put them into the Dremel. They worked a treat although I wore them out pretty quickly! Still, given that they cost about 2 cents a piece instead of 4 or more bucks, I am ok with that!
Brass and metal brushes - I have a bunch of different ones and these are excellent for cleaning but are also useful for pattern making on the softer metals. So there are a bunch of steps to go through before I can even start on the actual making. It gives me time to think ...
This piece has had a basic clean and a bit of a polish but will need to be scrubbed with steel wool and then progressively finer grades of emery paper (3M paper is a treat!). Eventually, it will look like this ...
Reclaiming metal is harder than buying new metal when you consider all the effort that goes into the process but I prefer it this way. I think it makes me more adventurous because the materials are inexpensive and that's a good thing because I seem to learn best from my stuff-ups! Of course the best reason for giving things a second life is that I am trying to tread lightly on this beautiful planet and still make lovely (frivolous) things!
Scrub scrub scrub polish polish polish clean clean clean ...