Yeah chain it in comfy to a turbo model for detail

A turbo model isn't the first thing I'd think of when it comes to finalizing a picture. Have you found one that produces high-quality output?

For detail, it'd probably be better to use a full model with a small number of steps (something like KSampler Advanced node with 40 total steps, but starting at step 32-ish.) Might even try using the SDXL refiner model for that.

Turbo models are decent at low-iteration-decent-results, but not so much at adding fine details to an mostly-done image.