I use gun kote all the time. Have done probably 30 or more 1100's and 1187's with it and it works great. Cost about $20 and couple of hours of your time. Media blast the parts, warm them in the oven, (using powder free / clean rubber gloves) hang them up and give a very light mist coat/ I use a heat gun between coats to keep the parts warm. then keep applying FINE coats until you have complete coverage. let stand 30 min and then bake in the oven. this stuff runs very easily. so again, keep the parts warm and apply fine coats, You will have a great looking gun that will not rust when your finished.
CPL holder since 1991, NRA Lifetime Member, DU Member, NICET certified
"For those who would give up essential liberty to purchase a little temporary safety, deserve neither Liberty nor safety.—Ben Franklin.”