My 2006 Toyota Tacoma's antenna bezel/mount was corroded under the rubber cover. I took a laser scan of the bezel just to 3D print a plastic one so the corrosion stops dripping onto the paint when it rains.
The model is not perfect, as the scan didn't get into the crevices, but when I 3D printed it, I just took a drill bit and drilled out the hole to get rid of the imperfections.
Also, be advised, the model does include the divots from the corrosion, because I scanned the corroded bezel, the model has those imperfections in it, but because the rubber casing goes over the bezel, I did not mind the divots
Using a Hexagon laser scanner