I haven't used Penetrol yet, but I may try it out for my final coats. You probably won't have to purchase/use it if you become proficient at constantly/evenly rolling (and rerolling) the paint until the bubbles are popped, before the paint starts getting tacky. It looks like you're rolling the paint when the surface is starting to dry, which results in all those rough spots where your roller is actually lifting paint away from the surface. As long as you don't press down into the paint when it gets to that point, you should be able to wetsand it all out pretty quickly and easily.