Good on you for tackling the project yourself.

IMO 230 grit is too coarse and aggressive. It takes a long time with finer grit paper to fully reduce the scratches 230 leaves behind. I never use anything less than 400 grit, and that only rarely when I can be very aggressive, like on a feed ramp. 600 is usually my minimum, with 800 and 1000 used much more often for real polishing rather than metal removal.

Polishing the back of the trigger bar candy cane loop that pushes on the striker block interface is also helpful, but 800 or even 1000 grit should be used exclusively.

The part of the trigger bar that engages the sear could use some 1000 grit polishing also. Any part of the trigger bar that rubs on anything else, even the frame, benefits from polishing.

The outside of the striker block could use a few dozen strokes of 1000.