As for that picture, I bet a lot of people would like to know about that finish, it's done with 2 different very affordable and readily available products and it seems to be very resistant to wear.
I achieved that finish in less then 10 minutes and I didn't even sand the part.
I'm not a stickler for accuracy and I'm perfectly happy with the random look I got but I'm sure someone with more talent then me could fine tune my process to recreate the look of the prop exactly.
Maybe I'll be in a better mood tomorrow and post some more info about that picture.