Sink update

I got this back from Thermocast support.  I emailed them yesterday evening.  Very prompt!

"Thank you for your e-mail. To restore the luster to your sink we recommend using just plain bleach and water or Clorox cleanup. Then follow up with a liquid based auto polish such as turtle wax, Maguire's cleaner wax or an actual auto "rubbing/buffing" compound. Do not use soft scrub, comet, ajax etc.. it will ruin the finish, if the above remedies do not suffice please contact us back."

I'll try it today.

Thermocast sink

We bought our house new about 4.5 years ago. All the appliances are black, but the kitchen sink was the shallow contractor grade steel one. So we bought a nice Thermocast black sink from Home Depot. Within a few weeks the glossy shine was gone on the interior portion of the sink. The upper surfaces are still pretty but the inside is dull, and looks like the polish has rubbed off. Anybody know what I can do to remedy this?

Hanging a wreath on exterior stone.

We have stone that goes around our front door. I'm not sure how thick it is. Each fall my wife asks me to hang a wreath on it and each year I rig something up with wire or cables and some hooks. I'm looking for a more permanent option. Perhaps a small hole on the top of a stone that I can put a pin in, or an anchor that I can put in a screw to hang the wreath from. Then when we take it down, I can pull the pin or screw out and the whole is not noticeable (because it is on the top of a stone above eye level).

Is this a good idea, or would the risk of breaking the stone be too great? Should I drill into the mortar instead?