I'm planning to hone my EJ20g block for v5 207 forged pistons and new rings. There are also some light scratches I'd like to see disappear as well, nothing major.
What grit should I use for the initial hone and for a final hone to achieve the proper arithmetic average (Ra) for my rings/pistons? I'm planning to use a flex hone. According to their website, 320 grit gets an Ra of 18-30 and 240 gets 24-32.