I need advice. I have finished a 30x17 room in my basement with cedar car siding out of an old barn (75 years plus). I'm using the back side of the wood. I want something to bring out the grain without much darkening of the wood. Using scraps I've tried Minwax Wipe On Poly, Lacquer, Fast-Drying Polyurethane and shellac all of which ended up darker than I want. I also tried some Wolman RainCoat sealant which produced exactly the effect I wanted but in conversation with their support staff I was informed that it is very inadvisable due to odor issues. Do you have any suggestions?