Youse could write a book! :notworthy:clap:Use a professional staining system, ML Campbell, Sherwin Williams, Mohawk, Valspar or the such. I use ML Campbell. Pine is a blotchy wood. So you will need to condition it. The two main ways to do that are using a clear stain base or a wash coat. I usually use the clear stain base, also known as a conditioner. A wash coat is best done with a spray gun. So I guess that leaves the stain base. If for some reason you want to use MinWax, it will be their natural stain. Put the stain base on and wait for about 30 minutes, then apply the stain. Be very consistent, try to leave a wet edge while you are doing large areas. Apply the stain with a rag, not a brush. If you do it with a brush you will apply to much into the area and promote blotching. Wipe it off with a rag that has been wetted with the stain and squeezed as dry as you can. After you apply the stain and wipe it down (while evening it off) with the damp rag, you will want to wipe it down with a dry rag. Most pro stains will allow you to top coat within and hour. MinWax will have to dry overnight or longer.
Boy, you are really pushing the dry times on those lacquers. I push mine too, but not that much. You are putting 4 or 5 coats on in 50 minutes. Most of my lacquers say to wait 1 hour between coats, I usually wait about 20-30 minutes depending on the temps. Sounds like you are just waiting for it to flash, which is not dry, just dry to the touch.
I use the SherWood system. A bit pricey, but I've found it is faster than others I've tried. Specifically, the T67F6 sealer, the P63W9 and W2 if paint grade, and the T77F57 topcoat. If the customer really wants the tougher finish I will use the V84F82 Conversion Varnish topcoat. Not as user friendly as the lacquers though and tends to chip when struck and then I have to switch my gun over to the F7 sealer. Are you in a temp controlled spray booth?Cache, what brand products are you using and what specific products in that line?
I use ML Campbell, mostly MagnaMax Pre-cat. Usually WoodSong II stains and Microton Dyes. Using dyes is a quick way to do things but they generally lack depth as they are a surface coating. Which is also why they don't blotch, they don't interact with the grain. The MagnaMax doesn't sand that well until about an hour of dry time after flash. I always push it as my time is worth more than the sandpaper I corn up. I think you are rushing things a bit myself. But your circumstances may warrant it.