I also would suggest a polish and etch , by hand with the right materials and etchant, I'll bet the the outcome will show cold shuts and no lamination but I could be wrong, only one way to find out & that is elbow work and time, do not do it with any modern polishing tool or grinder, if you want good results then polishing by hand with graded polishing papers and WATER not oil is the way to do the job, and the water does not need to be special water, tap, or other will do the job. regards
snody