https://www.senate.gov/senators/senators-contact.htm
Pick a senator (or both) contact them either by phone or email (usually there's a specific option that you need help with a federal agency).
For your rep in the House: https://www.house.gov/representatives/find-your-representative
I've used it on aluminum (mossberg receiver, etc.) just follow all directions like degreasing and prepping the surface/warming the can/shake it like it owes you money/keep the nozzle clean and it works like a charm.
Drop shipping can get you a lot of business without the hassle of warehousing, just be prepared for some flak about shipping times etc. that you don't have control over. If I were to open an online store that would be the route I'd go.
Some good info there. Acceptable accuracy ranging from match, to hunting, to military battle rifles are quite different. Bolt guns with full house rounds are probably not going to be acceptable terribly long for most users. Military acceptance standard on a battle rifle is 4 MOA, and honestly...