hinging to oily paper

[Scallywag]

I have to float mount a piece that is oil on paper. It is clearly older and the oil has soaked through the back so it is all yellow. Is there anything that is going to stick to this and hold long term? It's about 30" x 42".

 

[Prospero]

Anything that will stick to it is likely to damage it. This type of 'oil paper' is meant largely for preliminary sketches and general doodles so it isn't the idea thing to frame. Best way IMHO is some sort of edge mounting, although the piece is quite large and you might get sagging probs.
Also, every part of the work should be isolated from anything cardboard or the oil could seep into that.