May sound stupid just gone in caravan cupboard and in top corner it's as if a load of little. Orange things are growing out of it wiped it off but it has left what looks like little pin holes in it anyone got any ideas?
Sounds like a fungus. If it is you need to kill the spores with a fungicide but it will make a mess of the paintwork. I would also check for damp in the area as that could be the cause and if it is it needs seeing to.