I make peach scnapps each year and a few years ago i made a wash and brewed it with a receipt for a bass ale cloan used the same yeast as bass ale and grain bill as a clone then made a 1.05+ wash boiled it for an hour till I got a sg similar to the wort, hopped seperatly, and then blended it hot and cooled it to pitch the yeast. the yeast didnt have any trouble with the acid in the wash and it was about 25% wash and it had a nice undertone of peach and wonderful aroma ,I think Ill do it again this year. OH make sure you use hard water