Paste has been used for centuries to strop, finish and maintain razors, yes substrate makes a lot of difference as does technique and number of laps. Metal polish is aggressive and of unknow grit size and type.
Yes, aggressive paste and technique will thin an edge and while it can shave well, will micro chip easily.
Most folks start with paste for keenness and comfort and end up with natural stones to finish. Arks are all about stone face surface prep, though you may need an edge finished to a higher level than 5k, usually a good 8k edge.
Cnats are a crap shoot.
Yes, aggressive paste and technique will thin an edge and while it can shave well, will micro chip easily.
Most folks start with paste for keenness and comfort and end up with natural stones to finish. Arks are all about stone face surface prep, though you may need an edge finished to a higher level than 5k, usually a good 8k edge.
Cnats are a crap shoot.