I never had any problems with my 28G 1100. It had a sandblasted/blued top to its receiver, a replacement Simmons floating rib and a steel 20G Cutts plus a custom Bishop stock and fore-end. That gun served me well in many 28G and 20G NSSA competitions. After shooting it I'd strip it right down, clean the insides of the action, tuning fork, trigger mech, bolt and breech face, wire wool the magazine tube, clean the gas rings, clean out the gas ports with a wooden cocktail stick and lightly lube the whole thing. I wish I hadn't sold that gun, so if anyone comes across it please let me know.As well as the above mentioned maintenance, I like to scrub out the inside of barrel ring with fine bronze wool soaked soaked hoppes #9 on my sporting 12 every couple hundred rounds. It gets pretty cruddy in there.
I also disassemble the gas piston and scrub that down with the bronze wool while I've got it apart.
Also, find a drill bit that fits the gas ports close (on my 12 7/64" is perfect) and run it through them gently by hand (not in a drill motor, ever) to clean the cud out of those holes.
I scrub the magazine tube with bronze wool also.
The reason for bronze wool being that it does not leave nearly as many fibers behind as steel wool and it a few do stay behind, they won't cause rust.
I bought it on Amazon
HOMAX PRODUCTS 123100 Bronze Fine Wool Pad, 3-Pack
A 20 gauge 1100 set the world record for most shots fired from a auto shotgun with out a cleaning or breakdown in 1978 -- over 24,oo0 rounds. --and I believe it has yet to be broke by any other auto loader? -- Great platform --have fun -- Its a great gun!Don't believe what you read about having to clean your gun. A light coating of oil (I prefer Break Free) on the magazine tube is fine. Run a oiled patch through the barrel after a days shooting. It can go months without any further cleaning. Spend the time you save reloading. I shot the small gauge 1100's at skeet for years. Constant disassembly and deep cleaning does more harm than good.
I wash my underwear before I put them back in the dresser drawer, and I wash my dishes before I put them back in the cupboard. I clean my guns before they go back in the safe. I clean my lawn care equipment before they get put away. Maintenance keeps things working as they should, and they last longer.I don't clean the engine in my car every time after I drive it.