Larry,
I'm making some assumptions here but, if you are talking about filling pores on just the flat top and not any curves etc, here's something to try before sanding Rock Hard all the way off. The pores on QSWO should not be too large. Try sanding the flat top with 220 using a very flat backer pad. Give it a good sanding, not all the way through, just try to get most of the high spots flat. Next, mix Rock Hard with mineral spirits to get a very thin mixture. Probably 80% finish and 20% spirits will work. Put on a couple coats of this thinned finished, light sanding with flat backer between coats. The thinner mix should get down into the pores better and dry/level out better. If/when you see the pore marks going away, go back to full strength Rock Hard. You will need to put on enough coats to fill all the pores and have enough buildup to sand down to a flat surface. To get that glass like smooth finish, I'd guess 5-8 coast.
I've used Rock Hard many times and always start out with a couple coats of thinned finish first, then go to full strength as the surface gets flatter. If the above doesn't work, you may have to sand off and start over, but I think thinning the mix should work.
If you do start over, once the surface is prepared, I'd get a real thin mix of Rock Hard and spirits, like 65% RH and 35% spirits, and wet sand the entire flat surface using 400 grit wet/dry paper and the mixture as a lubricant. This creates a slurry that can be pushed down into the pores which will fill them. Once done sanding and while the surface is still wet, I use a plastic spatula or credit card and pull the slurry at a 45 degree angle to the grain to help encourage it into the pores. Use one of your wife's cards, she will not mind...Let it dry, sand and repeat. A couple of slurry coats should fill the pores and you can move on to full strength or slightly thinned RH varnish.