same lang ang laser etched with acid etched both can't be erased or reversed. but the thing with laser etching is that since the laser is in a machine you will have to remove the part you have to etch so we can laser etch it for you.

another process is sand blasting which blasts micro emery powder onto the surface, like acid etching, this process uses stencils. also canot be erased. different process has advantages on certain materials and applications. we only do laser and acid etchings...