Yes, it certainly can, BUT, you can't just 'screw' up with
Syntherol. The process takes time (weeks) so you can see if you screw up something in time to fix it. The people that have 'deformed' arms are like that because they lose sense of reality and they just try to make the arms bigger and bigger, with disregard to shape.
But if you do care about what you are doing is virtually impossible to screw it up as you have time to fix it.