Bumper of a Day

I finally got the tools (thanks MW) and the time to look at the rear parking sensors on my car. I had to take the rear bumper off to get access to the PDC sensors. I thought it was going to be a 30 minute job but it took about an hour. Mainly because of an expanding rivet which was stuck and it took me ages to get it out.

I think two of them are gone, and now that I've got the part number I can shop on Eebay for them.

Here is the bumper resting.