Went on a wet late season deer drive last season and left my 870 in the trunk for just a few hours and the receiver and barrel began to rust. I got the rust off but the finish is spotted now. I was disappointed when i realized it was not a parkerized finish once i researched the 870 but its a great gun so i want to get it repaired with a durable black finish. I prefer to do it myself and need to know a good route to take. A few questions i have follow: 1) How do i strip the factory 870 Express finish? 2) I prefer to have a true parkerized finish-is blasting necessary? 3) Does the barrel/receiver have to be internally sealed if a submersible method is used? Thanks for any advice.