It's very easy to use. You don't need to by an airbrush set - the paint comes right out of the bottle. The coat dries within 5 minutes. I tried to achieve an even result so I added a very thin layer (the more distance you keep between spray bottle and object the thinner the layer will be), let it dry for a couple of minutes and added another layer again. Did this about 6 times and uses 2 bottles (the second one seems to be half full).
I am not sure how long the coating will last - especially after upcoming weekend when we go offroading (and more especially after I chose to use white as color ). But I'll keep you updated. Here are two pictures. The photos are taken before I cleaned it properly. So my front and spot lights are still covered in paint. But it's very easy to get rid of the residue. I used a microfibre cloth and Degreaser.
All in all it took me an hour for the bullbar (incl. cleaning everything properly).
At a Glance
Product: Armor All Custom Shield
Price: 26 AUD per Bottle @Supercheap Auto
Time: ~1 hour including cleaning