I recently got a job to refinish oak bannisters for two stair cases. The homeowner wants to get rid of the dated orange oak and have them painted. HO picked a black color from Benjamin Moore so I plan on using their advance enamel in semigloss as the topcoat. So far Ive sanded off all of the gloss finish first with 150 grit and then 220 and decided to go with Zinsser Cover Stain as the primer. The BM employee recommended BIN but the Zinsser rep I spoke with recommended cover stain. Long story short I’m not happy so far with the section of cover stain I brushed on. I used a white china Wooster brush. The brush marks are evident, even after thinning it with mineral spirits. I’ll give it 24 hours and then give it a light sanding with 220 grit to hopefully smooth out the brush marks. The job is for two staircases and a cat walk so ideally I’d like a primer that I don’t have to work too much. That being said, would you guys recommend I switch over to BIN instead of CS? Or any other bonding primer for the rest of the job?