Hah.... I forgot about this thread.
Coconut oil- Not quite sure what the melting point is on that... (Looking it up now).
Ok... here is a list of melting points of oils. The melting point is the important part for this... too low of a melting point, and the oil will be liquid at room temperature. Too high of a melting point, and you will need a flame thrower (not just a blowdryer) to get it to melt. The second most important part is what the consistency of the oil is when you do melt it. Sounds like coconut oil is a no go because A- too low of a melting point and B- Poor consistency.
Oil Melting Temperature (oC)
Cocoa butter 34
Coconut Oil 25
Cotton Seed Oil -1
Lard 41
By looking at this chart, Coconut oil is in the middle of basically being liquid almost at room temperature. Cocoa Butter might be a little better. Lard requires much more heat to melt... but not a flame thrower.
I'm really interested in the opposite side now, though. The important part is the transition between states of matter. So, looks like you could do cotton seed oil at room temp, and then throw it up in the freezer.
Hope this helps!!!