So, from a hobbyist’s angle, I’ve played around with a few DIY mirror projects using different types of coatings. Honestly, what I’ve learned is that the type of coating can really change the game. Silver has this classic, unbeatable quality but it can get tarnished unless you seal it right. Aluminum, while not quite as brilliant, doesn’t degrade as fast, making it a good pick for something that lasts. Haven’t tried gold, but I hear it’s great for thermal mirrors ’cause it keeps infrared in check which is pretty cool if you’re into high-tech stuff!