I had expel applied (after a full detail) to the bumper, bonnet and front wings only on the Jag about 7-8 months ago
to be fair, you can see the edges (its a template cut), but you have to be pretty close to see it, however I have none, zero, zilch stone chips on the front end.
sadly, I didn't do the doors and typically had some stupid b1tch scratch it (its only small but its through to the primer) with either a handbag or something else sharp on her person - I have video footage, but couldn't ultimately identify them
So, for all those doubters out there - if you hate stone chips - do this !! - ceramic coating gives you a nice finish and easy cleaning but won't protect against stones