Timbermate does have a habit of shrinking as it continues to dry out however most of my experiences have been with using water based inks & dyes over the top which rehydrates the stuff a little bit before shrink back. Just needed more clear top coats (TO in my case) to fill the contours.
Not sure how it would go on Hardwoods that are susceptible to movement due to climate and atmospheric changes. Resin my be best bet as it is basically a clear glue that can be tinted any shade of colour if required.