I can say that minwax polycrylic is susceptible to most gun solvents. I finished a gun cleaning bench with several coats and had to go over it with oil based as Hoppes, break free, and other oils and solvents would melt it.
Gloss rubbed out is always better than looking through the flatteners in matte. You can also go gloss until the final coat, as it makes the finish less muddy.
Regarding Watco, I was going off of the Jewett finishing book. Supposedly if you leave a drop on a hard surface like the mirror and it dries hard it is varnish. Wrinkly it is oil and varnish blend. If it doesn't dry in a reasonable time it is oil. Watco dries wrinkly.
