To be honest, the Mono paints are not really any more difficult to match than any other paint. Indeed, the supertallics like Orange Grove and Celestial are standard metallics anyway. Having recently had a go at part spraying a wing in Typhoon with a rattle can (and I am by no means an experienced paint sprayer), and have a very close colour match, I can only conclude that the so-called 'professional' paint sprayers who have difficulty getting a close match would struggle to match any type of auto paint!
I think you would have actually found the Sunspot one the most difficult to repair of all - the front panel behind the bumper is severely bowed and has been pushed back almost into the engine, taking the rad with it. I wouldn't have been surprised if the nearside inner wing wasn't distorted too. By contrast, both the Biomorphic and the Orange Grove look much more straightforward - apart from the sill and wheelarch of the Biomorphic, the rest of the damage looks as though it only requires 'nuts and bolts' replacement of panels (though looking at them again, it looks as though both will need a rear H frame).