I want to apply some mixwax polycrilic while minimizing brush marks. I was thinking of adding a extender. What is the difference between floetrol and xim's latex x-tender? Can they be used with water-based poly? The latex x-tender says it can be used with "latex varnishes" and ' water-borner clear coating". Does it mean it will work with water-based poly (polycrylic)? Thanks