Green tea extract reduces induction of p53 and apoptosis in UVB-irradiated human skin
I drink GREEN TEA as my main beverage and my skin doesn't burn, (I also have a high omega 3 intake and reasonable antioxidant intake) But Green tea could also be applied DIRECTLY to the skin if you haven't acquired a taste for it yet. Obviously don't apply when scalding hot but after it's cooled.If you are drinking it then it needs making with water off the boil and brewed for no more than 2 minutes. (novices should start with just 30seconds brew time while acquiring a taste) If you are brewing up with the idea of applying it directly to the skin then make it as strong as you like.
I'd also suggest ideally you anticipated the potential of your skin to burn and applied green tea for a fortnight at least BEFORE going in the sun and continue for at least a fortnight AFTER getting burnt.
If you do notice any new moles then applying iodine regularly will deal with moles (I've tried this and found it works I wish now I'd taken before and after photos) I'm not sure I would delay treating a melanoma using this way though.