Never heard of that breeder or owner, if it is not Andre's customer we can be sure it is of German lines. Not sure if Andre keep book of buyers of his Dutch bantams.
As for taking off wall paper, I heard that using fabric softener and water would make them peel off so much easier. Either wipe it on the wall  with a sponge or spray it from a bottle, let it set, then you can peel it off with a putty knife. I've used it for years on old farm house walls.
As for stoves, any commercial brand will do. It would be nice to wrap the whole stove in a plastic bag with that degreaser (Stove off?) and let it set for a few hours and bingo, all done!
I've got a pizza pan that I got from Shakey's when they sold off all of their equipment, looks black and brown, and want to bring back the steel color. It is getting to the point it is sticky and food would burn on it. Its made of alumimum. I thought about using Stove Off and let it set for an hour and see if I can get it brand new.