Try using a black magic marker, that should cover the letters. I used a black
marker on the outside of my van with good results. The *chrome* trim around my
windows was pretty faded so I blacked them out with a marker. It lasted all
summer with many washings. Good luck with your new tires, many people on the
list use them with good results. Mine have over 30K with plenty of life in
them.
Ken Herman
86 Syncro Westy