Quote: If the overspray is water based fence paint try using very hot water before anything else, the hot water should break down the fence paint and then use the rough side of one of those small rectangular washing up sponges with more hot water to remove stubborn paint particles. End Quote.
Be very careful if you are going to remove the overspray this way. If you use the green rough side of the washing up sponges you will end up with a very scratched caravan. My son when he was about 10, decided my car needed washing, he used one of those sponges and used the green side to remove stubbon bird dropings. It left my car in a right old state with round scratch marks all over the bonnet and roof.
Imho, I would not go anywhere near my caravan with one of those sponges.
HTH
Graham