You can also wet down the area with soapy water, or Windex, or the like. Position the piece of trim where you want it, and use a squeegee to work out the water and bubbles. Let it dry and you're golden.

The wet area also allows you to easily position the trim without worrying about it sticking down prematurely.

Once it's dried, it's on there.

If it gets exposed to raw fuel, you may wish to seal the edges to prevent the fuel from dissolving the adhesive.