Sigs love the rear end of cars.. (not the side). I think the tail lights help, just the opposite as a radiator, that hurts most PLRFs.. Parking a car at the FFP or Target rear facing the will work.. You can obviously range either direction. Range at first or last light and not into the low angle sun..
@lowlight was saying this just in less words.
Your point about wind is worth noting. In the early days we tried just about everything... special paint, tape, foil - it just became easier to hop scotch or shoot back at the FFP.
Note:
This is were the Sig is actually a bit dangerous with it's super large beam, sense it returns off everything you need to be extra careful to determine if the read is the target or something else often appearing to be next to the target but in fact creating dead space and miss-reads. It is hard to beat the Sigs for the $, but at the end of the day they are using less controlled beams (test them under NV on a grid) and instead relaying of software gates. Understanding their weakness will make your reads more accurate. Once you are past the 900-1kish mark, it needs something much more reflective like a steel target, street sign or rear of car. In a weird way, this makes using it on a steel target easier. Were as when we used V21s or 25Cs any miss aim gave a read.. thats why tripods where so important.
Here is the grid I use to test beams..
https://www.snipershide.com/shooting/threads/easy-test-to-show-your-plrf-beam-size-test-and-placement.6901690/
I did a post showing a comparison of the sig and some other as well one with the Sig Binos.. Their beam is way way larger than their spec.. their spec is software produced. Unfortunately I can't find them.
