It doesn't look cool, and doesn't last (though it is easy to redo) but, electrical tape can be your friend!
There are even some kinds that are literally rubber strip with adhesive backing, and there's one my son had in the Air Force that basically only sticks to itself. I'm sure there is something on the market that will do what you want done, if you want to use it.
One of my personal requirements for anything that kicks, is FLUSH fit grips, or ones that completely cover the frame, and meet evenly with no gaps.
And a poor grip fit can turn something that really doesn't kick into a painful experience as well. I learned this shooting a 9mm Broomhandle Mauser. Despite being bigger and heavier than most 9mms, (which did tame recoil) the small grips, and especially the open slot in the backstrap for the shoulder stock attachment made it the most uncomfortable 9mm I've ever shot. Actually, a bit painful, though would be ok with gloves.
Shooting actual .357 loads from the uber light revolvers is not for the faint of heart, nor is it something that should be done often, not just for the gun, but for your HANDS and nerves. I know someone who suffered severe nerve damage from shooting too much .357 in J frame size guns. Its not a matter of "being a wimp" its a real thing, and real nerve damage can result.