I have used the Laurel Mountain browning solution and have always been pleased with the results. I have also used Plumb Brown and did not care for the results.
Amosfella
Would that be Bradford Angier's (spelling?) book?
I find Birchwood Casey Plumb Brown excellent for small parts but not so for large parts like barrels. The Laurel Mtn Forge solution is a pain to use compared to the Homer Dangler solution that seems to require minimal preparation and has produced excellent results for me on several guns - both barrels and smaller parts. I used to get the Birchwood Casey at Wholesale Sports but not sure if they still carry it. Check their website.