There are a couple of problems. 1. First do not just dump the paint into the tub then roll it into all the places. This will potentially cause pooling of the paint. If the paint pools up then it expands and becomes spongy. You can hardly see the pooling because of the high reflection of the paint. I did this and I had to remove the spongy spots sand it again and repaint using a new can of paint. 2. If you are going to do a second coat it means you would have to buy a second kit. The kit says to wait 10 hours before putting on a second coat but the paint hardens before the 10 hours. There is a "walk around" if you can put the unused part of the paint in the refrigerator and keep it cool until you are going do the second coat. Just note that the second coat will harden up faster than the first coat if you have cooled it in the fridge. One other thing...the faster you roll it on the pebblier it gets so for a smooth surface roll it slowly but if you want slight pebble effect then roll it quickly.