Not sure what you plan to do with your paint with reference to re-painting but once it is up to scratch a brilliant combo for caravans is the " Klasse Twins". Consisting of a bottle of Klasse All In One and a bottle of Klasse Sealant Glaze, the first one will clean your paint beautifully, lift oxidization, black marks and leave behind a real deep shine and a layer of protective acrylic which will keep the weather and uv rays at bay, next is the icing on the cake, the Klasse Sealant Glaze, this will seal the shine and protection provided by All In One and provide even more of the "Wetness" that professional and enthusiastic car detailers desire. This is top notch stuff and will set you back