Hi Sue,only took around 10 to 15 minutes with fairly hard rubbing.The 2 Hadeland (Rocket and a Sommerso)which are smaller,only 5 minutes each.
I cannot believe i have never tried the Brasso before.I use it every day getting scratches out of cds and stand next to the cabinet while doing it and thought why not.
On a monetary view i think the value of the 3 pieces have increased by a lot but the main thing is they are now nice to look at.
Cheers,Paul