Unfortunately, I had not checked the "notify me of replies" box and I was not patient enough, so I went ahead and began priming with the foam roller. I actually came back to ask a couple follow-up questions when I found the warning. The second coat created a uniform coat, but I have a few remaining questions.
1. What sanding grit is appropriate for this second coat of primer? I have been hand sanding with a sanding sponge and sanding sheet at 150 grit, but I'm wondering if that is too coarse? I have 220 and 320 at my disposal, as well as several of the more coarse grit sheets if in fact I'm not using low enough grit.
2. While the primer is nice and uniform, I can still see some grain coming through. No color issues, just grain outline. While I realize I won't completely be able to get rid of this, do you feel it requires a third coat of primer before moving on to the top coats? Or would this essentially be a waste of time and money?
3. Is Penetrol advised for use in what I am doing? I'm using the SW ProClassic Oil-based paint and found this suggestion on several sites, but I have not seen this consistently advised so I wanted to ask those with experience on the subject.
As far as the foam roller, it was much easier to deal with and less messy than the mohair. I found with the mohair that it would tend to glob up towards the end of the application. However, I am now thinking the culprit could have been my amount of paint left out at one time. On the first coat, I poured as much as I needed for the full application across all cabinets. Because the dry time of Zinsser is so fast, it could very well be that it simply started to harden in its own pool of paint before I could get to all of it. This time around, I poured in small batches and would simply refill, so that could have been the solution rather than type of brush. I do understand that mohair can get into grainy textures more efficiently and completely, so I may have missed an opportunity there. Will post pics of the second primer results