French to English Tech/Engineering Ships, Sailing, Maritime

Context: expert appraisal of problems on a ship

Il était donc convenu de *pierrer* / polir la soie, après une prise d’empreinte programmé le [date].
A ce stade, il n'était nullement question de *rectifier* la soie du maneton no. X du moteur tribord.

I need to differentiate between the terms "pierrer" and "rectifier". I was thinking of translating "pierrer" as "hone" and rectifier as "precision grind", but then I also saw in proz answers and in termium that "rectifier" can also mean "hone".
Is "honing" a less complicated/costly process than "precision grinding"? because I think this is what's at stake here. They want to carry out a simple intervention as a first step, and then if it doesn't work out, they'll go ahead with a more complicated/costly intervention.