Keeping hair straight?

I have to straighten my hair for a party tonight and the only products I have are hairspray, macadamia natural healing oil, chi iron guard, and some pomade. my hair is naturally super curly and ridiculously thick so it never stays straight and I don't have to time re wet or wash it because it won't dry in time. So can anyone give me some tips or an idea of what do do with my hair to keep it straight?