re: Shellacked Pine Box

Ryan... I've been using 99% Alcohol for a long time now and have had nothing but great results. DA is hard for me to get and after researching found many have switched to using 99% Alcohol. I've even done French polishing with it resulting in fantastic results. The small amount of water in it is so insignificant that it doesn't seem to matter. I used to use DA and really can't see a difference. 

To clarify what's the difference between 99 isopropyl alcohol and denatured alcohol?

Isopropyl alcohol is a secondary alcohol that has not been treated with additives (with the exception of water). Denatured alcohol is primary alcohol mixed with additives to make it unpalatable and, in some cases, even more toxic.