Dear God, please DO NOT GLASS BEAD BLAST IT if you plan on spraying on any coating. You will end up with a real mess. Most coating will not take root to surfaces that have been glass bead blasted. Aulm Oxide is for sale at most Harbor Freight and Tractor Supply(TSC) stores.
KG Teflon Gun Kote is great and will give you years of rust free service if applied right. If you want the best out there I have found no better then Cerekote. It is a little tricky to apply for the do it yourself gunsmith but it holds up like iron. Duracoat is another great option if you want to camo or coat items like plastic Glock frames as it does not have to be baked. Duracoat is easy to use but as with all coating the prep is the most important part.
If you feel that you can do your own gunsmithing work then more power to you. If you have a shadow of a doubt please do not tackle refinishing your gun get a professional refinisher or a gunsmith with a clue to do it for you. On average we get a couple guns a month that people try to refinish on their own. In most cases it cost more to try to fix it then doing it right the first time. I even had a guy that tried to apply Duracoat with a paint brush!! That was one hell of a mess to blast off and recoat. Be very careful taking advice from people on internet boards. There is alot of armchair gunsmiths out there that give some great advice and alot that give really really bad advice to.
Email me if you have any question about refinishing your 1911. I would be glad to help you out with any advice for no charge, we do refinishing of firearms, aerospace parts & gunsmithing for a living. We always try to answer our emails the same day if possible.
Take Care
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