some time ago i bought a 642 and had issues with the finish of clear over aluminum, it started peeling then pitting in the aluminum. my 640 will get rust under the grip. i wanted something to carry in the hot summer but my sweat is like battery acid. well that brings me to the 442. is that black an anodized finish on the 442? i figure that would be my best bet to protect the gun from my acid sweat. i am also going to look at the ruger LCR. all of the posts i have read had such good reviews i'll have to check them out. with the plastic frame i shouldn't have any issues with sweat. would the holsters for my j-frames fit the LCR?