From what you posted, I'd lean towards a 442 .38spl but IMO a model 638 DA/SA snub makes more sense. If you are hurt or wounded you could fire SA(single action) if needed & the 638/49 S&W design prevents snags or problems with coat pockets/pocket carry. Pacymer made a J frame grip that shielded the spur but I think it's no longer made in the USA.
The Ruger LCR is a top rated snub revolver but for CC use or add-ons, I'd go with a S&W J frame.
As for the coating, I'd look into
www.Bearcoat.com www.Robarguns.com or maybe
www.Black-T.com . It will protect the snub revolver, speed cleaning & aid in firing/operation. Bearcoat offers a lifetime service plan & it takes around 10 to 14 days to get from the custom shop. Robar NP3+ is good but costs more.
A CT lasergrip;
www.crimsontrace.com may help with training or defense. They now fit both S&W snubs & the Ruger SP101/LCRs.
Clyde
For a pocket holster see; DeSantis Nemnesis or for a J frame belt/paddle, the Blackhawk SERPA;
www.Blackhawk.com .