Have also been using clearbra - on my personal vehicles for over 20 years..
I will always have it put on the entire front end, half the hood, the back of the mirrors, and all the door edges..
My Black Grand Cherokee is 9 years old, has driven close to 40k miles all on the highways between the Pacific Northwest, California, to and from Texas and back..
The clearbra has absolutely SAVED that black paint from numerous things hitting it over all those years and miles..
I have absolutely no paint damage to the front end, the headlights, the fog lights, etc.,... And the apparent UV protection on the lights has left them and the thicker material on them perfectly clear over 9 years on the Jeep.. I have never had to do any "maintenance" on any of the lights, etc...
Yes, you can wash it, and none of my experiences with it involve etching, etc., perhaps I just am lucky or something ???
Yes, one can lightly polish this - Plastic - but you have to be careful, and not let it get hot...
If the clearbra is very old and very scratched, it will be impossible to clear it back to new.. It is NOT paint... Its plastic.. I have been able to improve badly scratched, old clearbra`s mostly on Porsche vehicles, those guys are really cheapo`s sometimes, and dont want to replace it..
I never have problems with the edges getting crap built up into them because I always work from the opposite end of the clearbra TOWARD the back of it to the edge, so I am not accidently or on purpose pushing something into the edge.. My edges are all perfect all the time..
All edges can be cleaned but it is really tedious and time consuming, you need a lot of pointed Q-tips and you have to be careful to not scratch the paint.. Perhaps run a line of 1/8" or 1/4" tape just up to the edge on the paint, and that should allow you some room to try to work out crap that might be built up there..
Sometimes, just gently washing it with a really slick soap will help clean out that edge if its been defiled...
The newer clearbra material is thinner, more clear and stronger... I just put the best 3M product on my 2007 TL Type-S front end, and it is hard to even find the edges of it..
Yes, it can be expensive, I believe it has always been right at $1k or so for a complete front end, etc., as described above, on my vehicles...
But this is always going to be way, way, less expensive, than having to deal with paint nicks, dents, etc., over the entire front end, and a repaint that may or may not be all that good, is going to always cost more and make a lot more possible headaches for you...
Yes, it can be removed, I use a heat gun - carefully - and get the majority of it off.. The remaining glue stuck to the paintwork is always the worst part to remove, but we are
Detailers, so getting the details done is part of this craft..
I vote "Viva la Clear-Bra`"
Dan F