Formica does make a nice top surface. Breaking the edge is a must, unless you are always dainty, which probably is a NO. It does have a higher cost, and is more work to apply. Some have difficulty with application, though there are many informative sources for application, with one of the best coming from Formica themselves.
They have a PDF online under a search of how to install Formica. If you had any problems they have a great team in customer service, you can reach them at.
Formica Corporation Technical Services Department, 10155 Reading Road, Cincinnati, OH, 45241; call (513) 786-3578 or 1-800-FORMICA™
As for finishing on the top I would use Poly over Shellac for endurance. Shellac can easily be damaged by chemicals, sometimes heat, and isn't real resilient to a pounding. Poly once cured is pretty tough. I would finish the top, then route my Dados for the track, and install them after. Generally when I make a work table like this, UNLESS I need it to be lightweight I use a doubled layer of material, mostly so I can use a longer screw to hold the track down. They can and will pull out if not anchored well, especially if you are clamping down on them.
I use a layer of MDF, then a sheet of Baltic Birch plywood on top, both 3/4" thick, I glue them together, and screw (1 1/4" screws) through the MDF to clamp the sheets together for 24 to 48 hours, then I remove the screws from the MDF, so they aren't in the way when routing, or drilling dog holes. I flip it, and on the BB ply side rout the dados for the track.
When I put the track in I usually use construction adhesive, but careful not to get it near the screw holes. I don't want it creeping out of the holes making a mess on the inside of the track. Then use a 1 1/4" screw to attach the track. Make sure the angle of the screws you use match the bevel of the T track exactly. Most of the T Track found in the US uses a flat head 82 degree screw. However screws found in the US don't always fit that description, and using a wrong angle won't seat the screw, or a domed head may not allow your bolt to pass. That is a must, but too many times I've assumed it was something everyone knew, but I keep seeing screws that won't fit, being used. If you, as I consider that old info, Sorry. Possibly someone reading will not know this.
Some will be determined by the weight of the track you use. What kind did you get? If you don't know the name were they using 1/4 20 bolts. or toilet bolts to attach the fixtures?