Laquer thinner seems to burn pretty well in gas engines. So I cannot see a lot of helpful by products produced to elevate a cats temperature. I have burnt straight laquer thinner in small amounts when removing varnish from gummed up carbs.

The only thing that I can think of is perhaps the exhaust gasses are hotter with laquer thinner. Never measured them so do not know.

If this is true then it could elevate the burn off possibilities in the cat. Probably the same as hot lean runs as one poster mentioned. A person may want to read some of the literature put out by the cat manufacturers.