I was at the HomeDepot the other day and was informed that I could pre-Condition wood using Mineral spirit. However, this is the information came from the very same person who told me that I could use Mineral Spirit to clean dried stain from my wood project, but after pouring a gallon of the substance on my project with no result, I realized that the guy probably does not know much of this stuff. Before this I had been using MinWax Pre-Conditioner and noticed how quickly one runs out of those and has to head back for more. I have a gallon of mineral spirit that could come in handy and wanted to know from those here is Mineral Spirit can in fact do the same job the MinWax Pre-Conditioner does, and seems to do well?
No mineral spirits are not a good conditioner for wood. Solvents in general will dry wood out and break down any oils that are in the wood. This leads to decay of the wood.
What are you conditioning it for? Do you plan to stain and seal it or are you simply trying to protect the wood?