IIRC, the frame is anodized aluminum. The anodizing gives it a very hard surface, but it's a very thin hardness. Any attempt at smoothing edges or surfaces will more than likely remove the anodizing. This won't affect reliability or longevity on an area like the beaver tail, but attempting to modify other areas, like the feed ramp, likely will result in causing problems at some point.
Glad I checked first. i was about to post a comment almost exactly as yours because the first time I shot my BT380 matte/gold finish I ended up cut by these sharp edges on th beavertail. I didn't care much at first, but days later I did notice it because it was hurting and a scab was forming. it took 3 weeks to heal and completely dissappear. When I used the gun again, I did notice that these edges are really sharp and the wound opened again, so I had to use gloves. Anyone knows if a Walther PPK has these edges on the beavertail? I did think about smoothing these out, but I don't want to damaged the gun.
Okay, let's go over this one more time, just to be clear.
If the beavertail is chewing up your thumb web, I see no reason other than cosmetic why you shouldn't work them over a little to smooth the sharp edges. I say "cosmetic" because I'm not sure about your "matte/gold" finish. If the frame is anodized to a gold color, then removing the sharp edges would leave the underlying plain aluminum showing, which could be regarded as unsightly, but it won't harm the utility or longevity of the gun. BTW, I smoothed the beavertail on mine, a standard two-tone. It seems to be a common complaint.
First let me point out that I am not a metallurgist nor have I ever played one on TV, though I did stay at a Holiday Inn once.
