Is SMP appropriate to locally camouflage hair loss from DLE (scarring alopecia)? (photos)

I am looking to conceal approximately five coin sized patches of hair loss cause by DLE. Is SMP appropriately used in each local area to conceal? I currently use hair fibres on a daily basis and it is quite effective, but is messy and is ineffective in the water (swimming etc). Furthermore, my DLE is in a very slow progression. There is a possible eventuality that I would end up with a full shaved head appearance. If I do a local treatment now, will a full head be possible later if required?