I forget what the red lines are made out of. I know the black lines fitted to Capri's and Porches etc is polyamide. Regardless, no metal sleeving. Given its normally petrol running through them, do you think cab cleaner is really going to be more destructive?
I've used carb/brake cleaner god knows how many times to clear the exterior when ive had overspray or god knows what on mine, and their fine. Given your just gonna be blasting it through with air I'd have no hesitation doing the same