I just had an inquiry from one of my clients who would like 50 - 100 custom mudflaps with a name/logo for his small fleet of semi-transport trucks. In the past I have painted rubber mudflaps with decently durable results for general use commercial trucks but these semis will likely beat the crap out of these mudflaps and see a truckwash just about every day especially in the winter so I doubt that any traditional method of signing a mudflap will work.