The solvent for varnish is lacquer thinner, but I cannot speak to what the lacquer thinner might do to the woolen item.
You'll need to use some lacquer thinner and a wire brush to remove any varnish on brick.
Lacquer thinner will possibly remove it, chemical stripper will definitely remove it.
Shellac and lacquer are both fairly easy to identify because they will redissolve in their original solvents. If alcohol (solvent alcohol from the hardware store, not rubbing alcohol) dissolves it then it's shellac. If lacquer thinner softens it, then it's lacquer. (lacquer thinner will also dissolve shellac, but alcohol will not immediately soften lacquer, so do the alcohol check first.) If neither alcohol nor lacquer thinner immediately affect it, then it's probably varnish.* http://ths.gardenweb.com/forums/load/wood/msg0822004022412.html
Lacquer thinner.
Lacquer thinner will remove it from most materials.
Nail varnish remover is as good as any expensive thinner. Been a nail tech 20 years and it works well for me.
It depends on the type of paint. Lacquer thinner will remove most oil based and latex paints from a paint sprayer, however, spray gun cleaner will remove it better.
No, varnish and lacquer are manufactured products that are not harvested in the Amazon Rainforest. Varnish is typically made from resins, oils, and solvents, while lacquer is derived from the sap of the lacquer tree. These materials are not sourced from the Amazon Rainforest.
To a degree, but if you are concerned use lacquer thinner.
Lacquer thinner has no sheen. It will thin any lacquer or enamel and imparts no gloss or change of that nature.
Use lacquer thinner on a rough rag. If necessary remove hardware from the door.