I've written a number of tutorials, many of which mention pretty strange materials--like lead tape. Where the heck does one find this stuff? These aren't exactly every day things. Most of the alternative techniques I've developed, and materials I've found have been the result of desperation. Hobby-specific supplies often aren't that great--or, conversely, they're fantastic but ridiculously expensive. I don't know about you, but I have a limited amount of money to spend on miniatures and a family to support. Nobody would fancy it much if I spent the week's grocery budget on minis.
Making matters more complicated, I'm in the US and most of you, my readers, aren't. It's just not that easy to find suppliers who ship internationally. Specifically, many of the materials used in my lead paned window tutorial are pretty obscure. The good news is, you can get everything you need from one of my favorite sources: Amazon. Amazon UK sells lead golf tape for £5.99. You can also get DecoArt Triple Thick Brush-On Glaze for £4.99. All of the windows I use are available from Hobby Builders Supply, which ships internationally.
Many things, like Americana craft paint, aren't readily available outside the US and Canada. The good news is, other brands of acrylic craft paint are. I happen to like Americana, but I by no means use it exclusively. With the exception of a few very bargain basement brands, which are usually pretty easily identifiable by their misspelled labels (and other obvious flaws), all acrylic craft paint is pretty much interchangeable. You might not be able to find the exact same paint in the exact same color, but you can pretty much eyeball it.
If I'm searching for a new color, I tend to splurge on five or six containers at once. As they cost about 99 cents (USD), that's not too bad. Also, too, I find that, for one thing or another, I use every color for something eventually. I try them all out on a piece of scrap wood, wait for them to dry, and decide what I like the most. It's important to let the paint dry completely before making any decisions; some burnt umber-type colors tend to be very ashy and purple when they dry. I personally prefer a richer, warmer hue.
I hope these pointers were helpful. If anyone has a particular product they're looking for, let me know! I'd be happy to help.