The Coconut Oil hardens up nicely when cold, I wouldn't see why not.
If you don't like coconut, you can substitute it in a recipe by using chopped almonds instead. Alternatively, you could use macadamia nuts.
No they don't, try mixing in some semen instead
Almond milk (Probably the best), coconut milk (not the best substitute), soy milk, or rice milk.
By filtering, paraffin is not soluble in water.
Not generally -- because there is unsweetened (baking chocolate). The best thing to substitute is cocoa powder and butter/oil/shortening. For each ounce of baking chocolate substitute 3 tablespoons of cocoa powder and 1 tablespoon of butter (or oil/shortening).
Whether chocolate chips can be used in place of a chocolate bar depends entirely on the recipe. If the chocolate bar is broken or chopped up, and the chips are the same type of chocolate - milk, semi-sweet or bittersweet - then the chips probably would be a good substitute.
Might be too heavy, leading to soggy or a dense textured cake. You can substitute applesauce-the amount is half of what the recipe calls for.
Paraffin wax and petroleum jelly are both good substitutes.
A substitute for dried/dessicated shredded/flaked coconut will depend on the recipe. Most use it for flavour and texture. In some recipes, rolled oats or wheatgerm could be the subsitute, but be aware that this will give a very different flavour, and is not suitable for some recipes. Coconut ice is very dependent on the texture and flavour of the coconut.
There is not enough oxygen for the paraffin to burn fully, producing poisonous carbon monoxide instead of non-toxic carbon dioxide.
substitute
For what?