The good, the bad and the really ugly...
While an attractive engraving job is always something to be admired, I have not liked the engraved lacquered horns that I have owned. It always seems that the engraving offers corrosion a direct path to the brass beneath, and once it starts that's all she wrote. (That's the bad.)
I do have my gorgeous Conn with the less than gorgeous Helen Willson engraved in three-quarters profile (she's the ugly), but it's silver-plated, effectively sealing up the brass beneath (and that's the good). One of these days I'm going to have to take it outdoors and photograph the engraving work...one of these days...