not directly. readings are skewed because of alcohol. there are however correcting spreadsheets on the internet. Northern Brewer has one also Valley Vintner
normally it is suggested to add one cup of stuck wine to the starter. once fermenting then add two cups, once fermenting add 4 cups, continue in this matter doubling the volume of stuck wine added to the fermenting wine each time fermentation restarts
verify what the kit will be initially then adjust with syrup or water as necessary. alcohol should not be used until wine is clear post fermentation. it will affect the taste and other flavor profiles of the wine. not suggested.
easy enough jut do a bench trail, take a measured amount of both say one cup combine and taste compare to the original. should give you the answer. want to get fancy combine different percentages see if a special blend is better than half half