I thought you might have some personal tips or insights to share. Let me give you an example what I mean.
If someone asked me about where I get aluminum for casting I'd tell them the last batch I got of over 100 lbs was from a marine engine dealer. The repair shop gave me a barrel full of pistons, and some broken outdrive cases for ten bucks. I showed them some pix of a lathe I'd built and a milling attachment, and they were happy to help me out.
Now I figure somebody asking me that probably already knows they could buy it at a scrap yard, or melt down an old broken lawn chair, but they might not have thought of an marine dealer, so that's what they were asking -- was there some experience that I had in finding it they might not have thought of -- a personal tip.
Of course you don't have to do that if you don't want to. No problem. Have a nice day.