Oh, there are ways. If you know enough about chemistry, you can burn just about anything; I know I personally have ignited quite a few things that most people wold consider non-flammable. However, as @koanhead states, it would be wrong, stupid, and illegal to say how.
What I can say is that if you don’t know what you are doing (or if you do know and merely do it wrong) you can fuck yourself up pretty good, cause lots of property damage, and maybe get people killed. A buddy of mine go the mixture wrong on some homebrew stump remover. The resulting fire was four alarms. Fortunately nobody was hurt! And @koanhead can attest to the fact that one of the things I have ignited is my own hands… more than once.