How do you get rid of mould spots of wood garden furniture?

I have a brand new garden furniture set bought this year and not used due to the weather! I covered it and yet now I see there is mould all over it and when I wiped it down there is marks and spots stained where the mould was... How can I get rid of or cover this?

How do you get rid of mould spots of wood garden furniture?
tsp works good for mold and unlike bleach will not harm the wood or raise the grain too much.