hmm I just went and looked,, they no longer list,, at least in an obvious place,, the acrylic urethane,, but the basecoat may be viable under acrylic lacquer,, I just am not sure..
the question was about topcoating with Randolphs,, it appeared he already had info that you can topcoat with AC
also keep in mind, many of the Shimrin colors are actually a metallica or pearl base with candy over them. typically the base metallic or pearl is very translucent,, and requires a blocking coat of a similar straight pigment color, or you will be spraying MANY coats for coverage. although white can be ok some times,, though striping would be a concern since the color is so transparant,,