Not long back I read somewhere that whiskey or other spirits aged in wood can be lightened in colour and its odor can be removed or lessened.
It was in the context of a discussion about aging and the market for aged products. The account said spirits can be turned essentially into white spirits if the market requires it.
I am wondering how in fact this is done. The account did not say how. One option is redistillation, and I don't doubt that occurs in some cases, but due to cost or other factors that may not work in all cases. E.g. say you wanted to bottle a rum of medium color and flavor, could you deodorise and de-color a dark Demerara for this purpose? Would this be possible for (say, American blended) whiskey? If so how is it done?