Yes it will come back as it's partly chemicals used, partly reaction to UV light.
Requires a bit of TLC like polishing/waxing the paintwork - this is no different to the oxidisation that you see with paint, particularly on flat red paints. Once you've got the gloss finish back you can protect with wax or products such as '303 Protectant' which is used for marine or aviation UV protection.
Don't go the vinyl decal route - these will be damaged by chemicals or scratching too, but you will then have the glue residue to remove when you replace.