Even if Steveaustin's ProAcs weren't an oil or wax finish, an oil would have penetrated through the sides of the cracked veneer. Veneers with tiny little knots (like some Yews) or burls have a distinct tendency to craze & crack over time. Once the surface is broken with a crack, then oils can get in and do their thing. As Lars says, things like Scots do make wood look pretty. But, it's just a surface film that doesn't penetrate most wood finishes. Furniture polish manufacturers tend to suggest their products can accomplish things that are unlikely, such as nourishing wood. Rather like the implied promises of women's cosmetic moisturizing products :-)
