Just to add a bit. Butyrate is C.A.B. or Celulose acetate butyrate. Nitrate is Nitrocelulose. Covered a few full size planes with it many yrs ago, and yes, the fumes can get you higher than a kite. Same solvent as the glue sniffers used to use. Could be acetone based but not sure. Memory's gone, probably from sniffing to much dope