I know what you mean Alan.
I rented a motorhome once and I ripped the bottom anchor on the roll out shade. I had to order the leg, drill it properly but first rebuilt the bottom area which was aluminum siding with a whole bunch of ridges. Ran to the local Canadian tire bought a bunch or paint cans close and managed to find the matching paint then, a bit of bondo, sanding, more coats sanding etc etc.
Finally, the owner when I retained the unit could not see any repair so I was happy but it was a pain to spend time fixing it instead of holidaying. I did a lot of body work when young but now it takes so much time and the new products are another education so I have stirred away for it .