Sand away all of the varnish and finish with several coats of boiled linseed oil instead - no finish on top of the wood, only IN the wood. If that doesn't work well enough to you, then stippling front and back portions of the grip will get you there without altering too much the appearance of the grips.
The adhesive from tape oozes out from under the strip, as it degrades, from time, sweat, humidity, and variations in temperature.Cut sections of a bicycle inner tube and slide them up where they feel best. Probably, a piece in each finger groove will work.
Pachmayr makes these, and I find them comfy and non-slippery when shooting. Pretty cheap too.View media item 1327
It feels just fine. The extra meat on the back of the grip helps fill the web of my hand better, and leads to less battering of my hand.How does the recoil with the 357 feel with those, I have a pair of rubber pachs on my Sp101 that I am considering swapping out for these.