For highly reflective metal, the main fix is usually lighting, not retouching. Put the pin inside a white diffusion tent/light tent so the metal mostly “sees” a large white surface instead of your camera. A white bedsheet, translucent white plastic, or similar diffuser material can work, with the lights placed outside the tent.

If depth of field is the problem when you angle the pin, adjust camera setup to gain more DoF: stop down more, increase camera-to-subject distance, and crop later if needed. A different focal length or camera position may help more than focus stacking.

If you must control the shooting angle while keeping the subject plane sharp, a shift/tilt solution such as bellows or a perspective-control lens can help align focus better.

As a last resort, some people use a removable dulling spray (or similar matte coating) to cut reflections, but that changes the shiny finish, so it’s usually not ideal if you need the metal to still look reflective.