I'm guilty of mostly 2 channel listening myself, tried multichannel setup with Chorus II's many years ago and was not impressed nor have i heard anything else to get me to switch over again.
Orange peel can be wet sanded out, just be extra careful not to sand through on the edges.
Start with 320 grit for stock removal and work your way through with finer sandpaper until you have a glasslike finish.
I can't believe how this woofer smooths out the frequency response in the La Scala.
The Table Tuba or Tuba 60 would also make for a great accompany with this woofer mod.
I have spent a great deal of time with both designs and each build has exceeded expectations.
One of the forum members measured their subwoofer outdoors although this particular cabinet is too narrow for 2 8" woofers, here is the link.
Good thinking, I'd like to buy some junkers on the cheap & recone them or maybe buy some new ones from Bob's stock.
Who is going to start the bidding for this fine example K-33 E woofer ?
Scrape of excess glue with a sharp scraper & sanding is the way to go, you may need some steel wool to get to the glue in the grain.
If its a oil finish you can just throw a coat of oil on to hide your work.