First of all I was always under the assumption that windowsill was 2 words. I wasn't sure if I was spelling it right so I went to check. The free dictionary and merriam-webster both have it as one word while wikipedia has it as two.
The reason for my post though is a jar that was sitting on one of mine.
Prim crafting uses a lot of rusty bells and pins but try and find any of that stuff in the stores. The cheap and easy way is to rust them yourself. I've read several different ways but I opted for the less toxic version. First you put the items in a jar and cover with bleach and let sit for a day. Dump out the bleach, pour in apple cider vinegar and a good helping of salt and let sit for another day. On the third day you dump the pieces out and let them dry. They continue to rust as they are drying.
The first bath I did worked really well. This second bath didn't rust as well