I textured our LR & DR after removing square tile 25 yrs old. I taped & primed. drywall was yellowed and now bleeding through. plus I mixed 1 gal. semi=gloss paint to 5 gal topping mixture and was going for a knock down finish.. I messed up the knock down, tried to touch up and made it worse. What would you recomend? using a different roller IPO of my nylon loop roller or can I spray?