Contributor post by Caitlin of The Merrythought Lately, I've felt like someone could come in and splash some watercolor patterns all over everything I own and I wouldn't mind it one bit. Unfortunately, in a few months, I'm sure I would be a bit annoyed with that decision. So I've been trying to come up with a few ways to add some faux watercolor splashes around my house. Last week, I was watching my cousin give herself a "watercolor" manicure and I thought, that would be a great technique to…