I plane and shape it with chisels. Very little sanding especially with a machine as it heats up quick. You can use perspex as a former and you get close to a mirror finish.
I assume you're talking about Repaircare (mirror finish). I was thinking about my experiences with regular two part epoxy. I've never tried using a chisel (or a plane) on that, always gone straight in with the sander.
Yes, repaircare for the perspex. The 'bondo' will plane just fine too. I wonder whether the 2 part does work with perspex. Basically repaircare won't stick to perspex so you can use it to form a surface and crack it off when it's dry.
I plane and shape it with chisels. Very little sanding especially with a machine as it heats up quick. You can use perspex as a former and you get close to a mirror finish.