Both of these were in horrible shape when I obtained them. The 4" was parked and the 2" was a rust bucket. Both were stripped, bead blasted and rust blued with Mike Lees Express #1. I am really happy with the way they came out considering the condition they were in. 4" is a 15-3 and the 2" is a 15-4. I added a target hammer and smoothed the trigger on the 4". Trigger was also smoothed on the 2". The Express rust blue was really simple to use. I have about 4 hours actual bluing time in each of them. Each one received 6 treatments.