I've never messed around inside of a Quark, but I used to do a lot of work with small DC/DC constant current converters. .5" in diameter. These things generated heat and I used thermal epoxy (arctic alumina) to "pot" the converters. Occassionally, I'd have to get back at the current sense resistors or something. What I did was to bake the assembly in a toaster oven set to about 170F. This makes the epoxy spongy, rather than super rigid, and then you can take it off in chucks with an exacto. Like I said, I've never tried this with a Quark, but the heat does have that effect on Arctic Alumina.

If you are going to try this, I should add that you need to preheat the toaster oven to 170F and let it sit for a while, before sticking the PCB, or whatever, in. Ovens tend to spike the temp way over the set temp just to attain its goal temp. Once it preheats, then it will stay at the set temp.