Hi, I am having the same problem. I have to paint baseboards for my entire house (300 linear feet). I have been practicing on scrap pieces of baseboard, but apparently, the learning curve is steep, and I don't have that much time. I have added water, but that doesn't help. I think the most frustrating thing is that I have been to Sherwin-Williams twice, and the employees, although very kind, have never heard of issues with ProClassic. I finally googled the specific paint, and voila, I found that it's hard to work with. I also have half a mind to walk in there with the paint, my brush, and a baseboard... and let them show me. I did ask one employee if he had ever painted, and he said no. :( Disappointing. I have a sponge roller, and yes, there are marks from when I join a freshly painted section to the previously painted one, but compared to the brush (where I have lines AND that same overlap problem), it's better. I have tried lots of suggestions, but nothing is really making a huge difference. I am using a Purdy XL Dale brush.. As soon as I lay the paint on, I see the brush marks. I tried working in small sections (between 6 inches and a foot), leaving the wet edge, but when I join the current section to the previous section in the series, you see the overlap. It seemed to be better when I used LESS paint; more paint led to deeper lines (and some dripping - I did try on the installed baseboard). Jerapa said to resist the urge to work the paint, but when I do these smaller sections, there's STILL the overlap... and yes, there are still lines. I've attached a photo. This looks AWFUL. Could someone please suggest a paint that will be easier for a DIY-er to work with? Thanks so much!

My mom (75) still has our marks on the wall (! very soon I will start growing the opposite direction...). She solved the repainting problem by taking some wooden crown trim and nailing a mitered frame around that section, like a built-in painting. Since the original wall was a lovely early 60's turquoise, it makes a statement. :-)

If it's orange slime (and it looks like there is some on the curtain), then it is the bacteria Serratia marcescens. Clean it with a bleach-based cleaner.

Betting you have quartz tops…which are made with 33% plastic resins. Despite what the industry prosletizes, these made made slabs are not indestructible. Heat with burn, melt and scortch quartz counters.