Hi Gus1Gus1,
Thank you for your review, and I am sorry to hear the paint was thick, and it showed roller marks, even when maintaining a wet edge. I can assure you this is not how we expect our product to perform. If in the future, the product is too thick and stirring doesn't help, we wouldn't recommend continuing using it. Also, we wouldn't suggest adding any other products, such as additives, as this can jeopardize the integrity of the paint. However, to fix, we'd recommend applying a fresh new coat of our Premium Plus Paint (https://www.homedepot.com/p/BEHR-Premium-Plus-1-gal-Ultra-Pure-White-Flat-Zero-VOC-Interior-Paint-and-Primer-in-One-105001/202761505) instead, as this has more pigments to help prevent roller marks. To help turn this experience around, please contact us directly; we'd love to help in any way we can. We hope to hear from you. - Edith