An aerosol bottle was $75 with shipping via Amazon (Prime not available). It is by far the easiest to get to work etching spray I have used. I’ve used Moly Lube and had lot’s of issues with different metals. LaserBond works great with one thin coat, 2 minutes later you are good to laser just about any metal surface. I used Ajax and a steel wool pad on this and none of it came off.
Material: uncoated aluminum and brass
Spray: 1 thin coat of LaserBond 100
GF model: Basic
Product link on Amazon: https://www.amazon.com/gp/product/B0875QLGXR