Corrosive ammunition simply means the primers leave a salt residue. Salt in terms of chemistry, not NaCl table salt. Which is a salt too, but you won't die if you eat it.
These salts attract water and when wet, corrode the heck out of metals.
They dissolve in water too. Won't dissolve in oil. You can use a standard bore cleaner, which is oil based, and they won't dissolve salt.
So the "trick" is to clean out your barrel with water. Like hot soapy water.
Stick the end of the barrel in a pan of hot soapy water, put a cleaning rod with patch down the barrel, and pump.
This is messy so expect to wipe off the water that gets in the action lugs.
After pumping enough times, dry the barrel out. You can clean it afterwards with bore cleaners, or you can simply oil the barrel and put away.
I have shot thousands of rounds of corrosive surplus and no barrel has ever rusted after the hot soapy water treatment.
Wipe off the bolt face with water. Windex is mostly water, you can spray windex on a paper towel and wipe down the metal parts.