I don't disagree with the above (super shiny on models) but I recently took the plunge on my recent build for a sorta-super shiny finish. I basically wanted to remove the orange peel effect first off, and achieve a decently glossy finish.
FWIW I'm relatively new in the hobby so take that into consideration when reading the next bit.
I primed using Vallejo primer with my airbrush. It worked but it was my first time using it and I didn't like it much.
Applied 3 coats of colour, airbrush again.
4 coats of Revell rattle can clear, let dry for a few days.
Wet sand 3k, 4k, 6k, 12k.
Tamiya Coarse polish with Tamiya polishing sponge.
Tamiya Fine polish with Tamiya polishing sponge.
Applied Tamiya wax.
I was pretty happy with the results and despite being a lot of steps, they went pretty quick. I'm used to polishing real cars and spending 50+ hours on a polishing project, so this was nothing!