From the right side you can literally lift it up. This car looks good with spoiler and I need to do something before it comes off one day

 

The inner pedestals are bolted onto the trunk while the outer pedestals just pop off.

Remove the inner trunk liner by popping off it's clips. Disconnect the brake light connector. With an extended ratchet wrench and sockets remove the nuts securing the inner pedestals. Each inner pedestal has 2 nuts. Now just pop off the outer pedestals separately. They each have 2 clips that pop into grommets.

 

That air spoiler was a poor design with those outer pedestals just being mounted with clips. To keep the spoiler from popping out again try replacing the clips and grommets. You'll need long needle nose pliers to reach the grommets from within the trunk. With the spoiler removed I would also replace the gaskets.

Clip (4) 01553-04631
Grommet (4) 01553-09621
Right outer pedestal gasket (1) 96050-31U00
Left outer pedestal gasket (1) 96051-31U00

 

Some warnings on things that happened to me.. I removed it to repair rust under one of the mounts, when I reinstalled it the center brake light in it no longer worked. I ended up removing the tiny (and apparently fragile) connector and splicing the wires together.. I also had the nylon clips on the sides all break, they simply would not pop apart without breaking..