I'm not so skilled at Photoshop, so that's not a solution for me. Early on I figured I'd do without filters or coding and see how it went. I took the M8 on a tour/vacation to Malta, Sicily, and the Canary Islands, using the 28 Summicron and 35/2 Biogon. No filters, etc.
Most photos looked fine, no noticeable IR effects. Sometimes grey or black fabrics looked a bit violet or purple but it was ok, while at other times it pretty much ruined the shot, at least for color. Shots in a restaurant lit only with tungsten bulbs were unusable in color (too much IR content I guess), and no amount of fiddling with the processing (absent those PS skills) could fix them; the color spectrum was simply screwed up.
Well, I'm using filters and getting lenses coded, and now the colors look better, not just those fabrics. CornerFix is another solution too. I've used it when I messed up and set the camera to UV/IR Off when using a filter, or when I used the wrong coding and the lens wasn't recognized, or even with the 18 Biogon with no filter. Handy program, but doubles the size of the output files, which then retain that doubled size even after processing the DNGs to TIFFs. There are compression options, but I opted for max compatibility.