Congratulation on your ingenuity but want to point to 2 specific issues induced by this type of repair.
1. Silver color paint will change the original collimated light beam to a diffused one, fundamentally loosing optical beam pattern for low or high beam. Result would be practically unacceptable light coverage for driving at a speed.
2. The diffused beam will blind upcoming traffic to an unacceptable level, so don’t be surprised to see the upcoming traffic flashing lights at you.
Headlights are optical devices and quality of their reflective surfaces and refractive front elements are necessary for them to perform as originally designed. It is possible to professionally resilver (ancient) or aluminum vacuum coat reflective (modern) surfaces but costs of these services will likely be higher than costs of replacement parts.
Sorry about pouring cold water on your project.