Another option for engraving, if you have a DXF of the part/area in question is Carbide Create --- while the new v7 is tied to Carbide 3D machines (ob. discl., I work for Carbide 3D) v6 as noted at:
https://carbide3d.com/blog/carbide-create-v7/
is freely available (but unsupported), for doing...