I have approx 80 sq ft of concrete porch that the previous owner(s) have painted several times and is peeling terribly. The top 2 coats are probably latex, the flakes are very flexible/bendable. The bottom coat was probably oil based. To my knowledge, that itself is part of the problem. I didn't think you were suppose to put latex on top of oil base. Regardless, the top 2 coats are peeling and I have bare concrete in some spots. Does anyone have experience on how to remove all the paint? Pressure sprayer (high or low)? Sandblasting? Needle scalers?