Means of coating substrates with a paint-proof layer

Means for paint-repellent coating of substrates that allow easy paint removal, without having to be reapplied thereafter, are characterized in that theya) a hydroxyl-containing branched saturated polyester having a hydroxyl number (mg KOH / g of solid resin) from 180 to 320, having a hydroxyl content, based on solid resin, of 6 to 10% and having an acid number of at most 6,b) at least one polyisocyanate,c) a polysiloxane-modified polyisocyanate,d) a curing catalyst for polyurethanes ande) contain at least one organic solvent.