I do it myself. Several ways to do it. The way I do it is choose the pattern/design I want and lay it out on a graphics program. (-simple is your friend in this) I use heavy shelf vinyl that has the sticky back. I don't care about the pattern that is printed on it but I do like the non-textured type best as it sticks to itself better IMO. This is sold at WalMart.
Apply two layers of the vinyl onto the glass. Print the pattern/design off onto regular white paper and use 3M Super 77 adhesive to affix it onto the vinyl. Use an Exacto Knife and cut on the lines of the design and peel to expose the glass surface. When completed, you should see the facsimile of the design/pattern by holding the glass up to the light. If you see any defects or ragged edges showing thru, now is the time to correct it.
Next, it is time to etch. You/I basically have 3 options depending the texture I am wanting. I save worn-out aluminum oxide from my blasting cabinet, so I put the worn out media back in and lightly blast the glass. This gives the frosted look. I also have an air-powered eraser that came from Harbor Freight. I think these are less that $25. These are very controllable and make a very crisp edge and a smooth texture. Also, I use a
glass etching acid that I get from my local arts supply store. I also use this acid to etch the windshields and door glass putting the Triplex logos on. If you want to be creative, you can do three different textures by starting with the acid. Once that area is finished, apply a layer of heavy masking tape over the etched area exposing the unetched areas. Use the air eraser to do the rest, and then tape over the area you want protected. Then use the blasting cabinet media to add the heavy texturing.
Now I may have a 4th way soon as we are building a CNC laser now. I will use mine for logoing Model-A glass, and for cutting fabric and panelboard in my upholstery shop. If you don't want to build one of those, then your local trophy shop likely has a laser they use for trophies and glass objects. The laser will be much more detailed however I doubt it will be able to give the textured look like the different grades of media will.
Good luck and cherish the time with your grandson. Now IF you want to be a 'hit' with your grandson, buy him a 3D Printed CNC and add a 20w laser. The price for building these kits are cheap. The uses you will find for around your Model-A shop will be amazing. All your tools can now have your logo or initials on them. Jigs and fixtures can be etched with the tool name and set-up instructions etched onto the metal. Holiday cards can be custom made on paper, -and making special little gifts etched on wood saves your hide at 11PM the night before your significant other's birthday or anniversary. Think of the money you will save on Christmas gifts by engraving custom knives or utensils for your buddies. The list just keeps going on what these things can do!!
