re: Registering old boat trailer with no papers. Is it even possible in LA?

I went through the Justice of the Peace/Judgment of Possession process in Baton Rouge. The process took about a month. I tried to get the state police to sign off on it being a home built as I had a bill of sale for a damaged trailer frame and receipts for an axle, tongue, bunks, tires, lights, hitch, etc. They refused saying there was no way I bent the aluminum I beam frame at home despite having receipts for the rest of the parts. I got nowhere going that route. About 5 years earlier, state police did sign off on a trailer under the same circumstances, so I thought I’d have no issues. I was wrong.