Hi Dave, best to wait for Andy to drop in as he has plenty of experience using DT with other stuff too.

From my limited experience I don't think DT top coats will go over acrylic but you could always test that theory on some scrap timber. Tend to think once you have acrylic on DT that you will have to keep going with acrylic to finish everything off. For me DT has been well behaved when coated with naughty oil and see no reason why it would react differently under acrylic.