Electrical – use normal metal electrical box for outdoor low voltage installation

The common practice for future expansion is to install the box and put a blank cover on it.

That eliminates the requirement of chopping into the drywall to find the wire. It also eliminates the need to create as-built documents and store them for future reference so you can find the wires later.

My recommendation is to install device boxes with ENT (referred to as "Smurf tube" since it is bright blue) connected to them from the basement or attic. Then when you decide to install a structured cabling system it can be the latest technology. Or, if you decide to update to fiber in the future you will have easy access to these boxes.

Communication / data is a dynamic field and planning for the future is difficult if you use a permanent wiring method stapled into the walls. In commercial buildings we normally install 4" square boxes with 3/4" conduit and single gang mud rings for the drywall. That way wiring can be easily replaced in the future.

Good luck!

If the box is grounded, there isn't a reason for wrapping tape around the box unless the receptacle is loose, and you have movement of the receptacle. This would be a poor way to correct the problem, because the tape on the box may come loose over time because of dampness in a workshop. The optimal approach would be, to use oversized screws to correct this. I would also use a metal box cover for the metal box.

Furthermore you may want to see if one of the outlets ARE GFCI protected type. You may or may not have water in your shop, but usually there can be a lot of dampness present in a shop. If one of the receptacles isn't GFCI then you may want to purchase a GFCI breaker for your box, and replace the breaker that powers your outlets. You could also use a GFCI receptacle for the GFCI (Ground Fault Circuit Interrupt), but it is normally limited to the number of receptacles depending on your local codes. Good luck!