I use Protect-A-Tow tarp between the coach and my Lincoln MKZ Hybrid. But after only 1000 miles of towing, I found many rock dings low on the front facia just outside the tarp's protection....about 8" on each outside corner. So I was searching for a 3M type film to put on two lowers sides of the front facia.
While in the San Antonio area I found a company called XPEL that makes "stealth film" to protect paint and headlamps. Their film is more pliable and much more glossy than the 3M film on the front of my 2004 motorhome (which has a slight "orange peal" surface). While at their factory, I watched them apply film on a brand new black 911 Porsche Carrera. Wow, the film just disappears when it dries in an hour or two. They had all kinds and colors of luxury cars in their application room and you just can't tell where the film is applied.
I paid $450 for the entire front facia and both rear view mirrors. On their website you can look up the year, make & model of your toad and get an idea of the coverage and cost.
Check them out.....
XPEL Technologies Website
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Bill & dear wife Helen
Last of the Chieftains, 2004 39T, W22, UP tune, Banks, Koni's, Safe-T-Plus, SMI brake
2017 Lincoln MKZ Hybrid towed 4-down or my 2008 Jeep Wrangler JK