How short was the stem that got replaced, because this one looks like it's maybe a 90?

Ritchey stems are fully painted, but are just plain black anno underneath. Water-based stripper will have one clean in 10 minutes.
Matte-finished Shimano PRO logo come off with acetone, like the 3T. Which is good, as the graphics usually start to fade pretty quickly.
FSA puts their logos in the clearcoat, so no-go there. Thomson are laser-etched.

I find logo removal to be most useful on alloy handlebars, as the graphics seem to get messed up/scuffed/worn more quickly than anywhere else.