Here is a picture of my 24 guage trade gun barrel.
If you guys are old enough to remember, I bought this barrel from the late, great Curley Gostomski when he was living in Dayton and that was over 25 years ago.
The barrel is finished with B/C Plum Brown, it is the original finish.
Streaky enough for you?
The gun has had I can't even guess how many rounds fired through it, It was my 'rendevooing' gun back when that was popular, and it has been slid in and out of blanket cases maybe a couple thousand times.
Durable enough for you?
The secret is in the metal preperation.
High polish, complete degreasing, no finger prints and the application of heat.
The Plum Brown sets up best at a temperature range of 120 to 150 Farenheight and be warned, it stinks and the fumes are not healthy so do this in an open well vented area.
Card the rust that will form, degrease and reapply until you achieve a depth of finish that pleases you.
The stuff isn't rocket science to use properly and the finish is a whole lot more uniform than pissing on steel.