This leads to the need of what is called "grinding" as one must go over the hard wall again and again trying to smooth out the hardened wall and any major catfaces must be filled in with a contour putty, joint compound, or reworked by blending in a fresh, thin coat. The finished wall will look glossy and uniformly flat and is smooth to the touch. After a few days it will become chalky white and can then be painted over. Mix From the time the bags are dumped into the barrel to when the wall is completely set is called a mix. Varying on the technique used and whether accelerant or retardant is added, a mix typically lasts about two hours. The final moments are the most frantic if it is smooth or if the mix sets quicker than anticipated. If this happens it is said the mix has "snapped" and is normally due to using old product or various types of weather (humidity or hot days can cause plaster to set quicker). Normally only three or four mixes are done in a day as plastering is very tiring and not as effective under unnatural lighting in the months with early dusk. Seasons Plastering is done year round but unique problems may arise from season to season. In the summer, the heat tends to cause the plaster to set faster. The plaster also generates its own heat and houses can become quite hellish. Typically the plaster crew will try to arrive at the house well before dawn. In winter months, short days cause the need of artificial lighting. At certain angles these lights can make even the smoothest wall look like the surface of the moon. Another dilemma in the winter months is needing to use propane jet heaters (which can stain the plaster yellowish but do not otherwise hurt it), not just to keep the plasterers warm but to also prevent the water in the mix from freezing and generating ice crystals before the plaster has time to set. Also if the water hose is not thoroughly drained before leaving it can freeze over night and be completely stopped up in the morning. Textured Texturing is usually reserved for closets, ceilings and garage walls. Typically a retarding agent is added to the mix. this is normally Cream of Tartar (or "Dope" in the plasterer's jargon) and care must