I just spent two years experimenting with laser ablation of various metals with a high powered fiber laser that can concentrate its output into picosecond pulse

I just spent two years experimenting with laser ablation of various metals with a high powered fiber laser that can concentrate its output into picosecond pulses (MOPA). I do think that something like silver plating would make a target vastly harder to destroy. That said, it's one more thing that needs to be added to a weapon that likely also needs to be hard to lock onto with conventional countermeasures, survive high speeds in atmosphere, handle high heat of engines and launch systems, etc. Rain might largely dissipate the laser over any distance. The wavelength of these lasers tends to be in the infrared. Having a second laser of a different wavelength would drastically reduce the number of materials that could be used to reflect it. Use of some kind of flak to dirty up the target could help a lot. I've found that something as simple as some pen marks on mirrored silver can make it easy to ablate. The real advantage of this tech is that it's light speed and very accurate. It could slice up a swarm of drones in a moment, or be aimed into a jet engine to avoid reflective coatings.