Here's an old bike of mine from ~5 yrs ago. I bought some sheeting off ebay, something like 3'x15', at an amazing low price. It was 3M sheeting with minor coating defects. I think the seller worked at the 3M plant, so I got it cheap. I cut it into 3/4" strips and wrapped all the frame tubes.

My newer bike also has 3M Scotchlite reflective sheeting on the DT, TT, fork and fenders.