I took my bumper off for the first time last weekend and have to say that it was very very simple.
Starting from the top you have two screw bolts either side of the bonnet catch, They come off and then there is plastic poppers at each side above the headlights.
Next was 2 bolts at the front of the wheel are where the bumper meets the wing, There is a couple of ways you can undo them but if you want to do it quickly with some force just push the wheel arch liner back and get a a socket on it.
Next there is something like 4 bolts (I cant recall) that is under the bumper that are holds the bumper under tray top the subframe / Radiator support. Undo them and then you are ready to pull the bumper off.
Like I say it took me longer to jack the car up, put Axel stands under it and get the tools out than it did to get it off.
I personally cover all the bolts and screws in a small blob of standard multi purpose grease on each one before is screwed them all back in .