Allow me to ask a dumb question
Allow me to reply:
"Not a dumb question at all.."
The answer to that question seems to be quite elusive for most of us.
It's would seem that the proper answer is; "To be on the order of a 'personal choice'.
A majority of those who have polished their A/S seem to agree on this one point.
Once you've polished it, it'll require a semi-annual application of efforts to maintain its luster.
I would suggest to you, thatís where a personal choice factor comes into play.