Was thinking that the term "naptha", as used by the proper chemist, would usually mean pet ether. Diesel starting fluids can be washed and dried for a good approximation of LG petroleum ethers. Long as you don't try to get it all.
Seems a lot of the US cooks are under the impression that charcoal lighter or white gas or some particular such heavier naptha are fine. Rumor is that the correct NP makes a BIG difference to those who desire better purity and choose to introduce fewer variables from dirty reagents, while still maximizing effective yields. Birchers use the blue fuel a lot to wash the muck of the birch, and this and lots of publicity on certain brand name compounds has led a lot of people the wrong way in search of "naptha", is what Igor told me.
Panda's word. High grade ether or toluene or something comparable or do not bother. OTC fuels without reengineering them no way.
The difference between theory and practice is practice...