Cover your refrigerator shelf with Saran's Press and Seal Wrap....then when it gets dirty you just peel it off and apply a new piece!!
How to paint letters perfectly...duh!
A tried and true method. Cut scrap paper to the size of the frame and mark the nail location on the paper. Using painter's tape, move the paper templates around the wall until satisfied. Then hammer the nail through the marks. Remove the paper template and hang!