My urethane sweats oil easily also. When I first joined this forum some members tried telling me urethane doesn't absorb oil. Evidently they didn't own and use urethane currently.
The oil may not get as deep which could explain while it expels it so easilyy.



					
				
					
					
					
					
				

  .... posting the pdf I found on here in case anyone else wants to use it :


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