How can you get tissue and skin off of a frog skeleton?

I am doing a project and the frog needs to be mounted without any tissue or skin or connective tissue, is there a way that i can boil it? Or use common chemicals to get the stuff off?How can you get tissue and skin off of a frog skeleton?
Let nature take over! just make sure that no raccoons steal your frog. keep the frog out side for a week. bugs will come and pick all the meat off the frog. when all the tissue is gone, lay the bones in the sun to bleach them.