Our brand new pool replaster project was completed in late October and after "Start-up" process, there are blemishes all over the pool. The pool plaster company does not do start-ups [I was informed of this as the pool was filling...] and upon inspection today, acknowledged the blemishes then blamed it on the pool start-up guy. The start-up guy kept a log [for just this reason] yet the plasterer guy was not interested in looking at it. Nonetheless the plasterer guy has offered to acid wash the pool. Is this a good idea? How many acid washes does a plaster pool have before needing replaster?