How to remove varnish<br>Create good ventilation. Whether your sanding or using a chemical solvent, it's a good idea to have ventilation. Open windows and use fans to create cross-ventilation if you're inside.
Cross-ventilation can only occur when windows are closed.
( z1 possible :ARG1 ( z2 close :ARG1 ( z3 window ) :time ( z4 close :ARG1 z3 ) :mod ( z5 only ) ) :ARG0-of ( z6 cross :ARG1 ( z7 ventilation ) ) )