I've "improved" my Nissan Leaf logo by adding STER on the end - now it's a LEAFSTER. (Or you could make it a LEAFER.)

The extra letters are in the same style as the LEAF logo. They're stuck on with thick double sided mounting tape, then I used rubber spray paint (eg. Plasti-Dip) to make the whole logo black. (See https://www.youtube.com/watch?v=ecKjI2HpGRw&t=304s )

I've also provided a PDF kerning (letter spacing) guide.

I printed my letters in PLA at 0.1 mm layer height. I didn't bother sanding it smooth. If your printer can go below 0.1 mm then try that. I don't know how well the PLA will cope with summer heat (Update: it's lasted the last 2 years with no sign of degredation.). The double sided tape may fail in winter rain too. Time will tell.

This is all removable so it's no big deal if it doesn't work.