Hi Lies,
Thank you for your review, and I am sorry to hear about all the issues you had when applying the paint. This paint should cover in one coat when going over a previously painted/primed wall, and when using a color from our One-Coat Collection. As it turns out, Polar Bear isn't part of this collection. I am sorry about that. For the rollers mark, it's best to use the "W" technique in small sections. Also, it's key to maintain a wet edge. To help with this, please reach out to us directly; we'd love to help turn this experience around. -Edith