We stripped the ugly blue siding off a big shed so we could sheet it and put a vinyl siding on to match another outbuilding and compliment a newly built residence on the same property. Being a cheap-a$$ i could not just throw the old barn siding away. The back side was white instead of blue......PERFECT, I put it up reversed as a ceiling, and cut back the conduits to flex thru the tin. I then surface mounted the J-boxes for the lighting, but i could have just easily flexed them to stay between the ribs and mount flush. Looks great, saved a fortune.