turpsy

adjective2

1. •
   soaked in or smelling of turpentine

   • Back at his canvas he drew some more with Prussian blue, wiped his hands on a turpsy rag, and went over to the telephone. — 1960
2. •
   heavily diluted with turpentine

   • But another canvas of the same size [probably Studio II] was only just begun: it had been scribbled all over with a very loose turpsy mixture of ochre-honey colour with a biggish brush. — 2005