I'd certainly agree with that. The last one I had painted was a few years ago now and was getting up there. Stripping reveals a multitude of sins. I heard of one that had some hail damage that had been bogged probably decades ago. Not a word in the logs. The painter was was quite happy to rebog it ... for another 6 grand. I dread to think what is underneath some of those shiny paint jobs.
i know of a few B747-4**s' getting around carrying a few tonnes of Bog.