Hand lay-up is a molding process where fiber reinforcements are placed by hand then wet with resin.
The manual nature of this process allows for almost any reinforcing material to be considered, chopped strand or mat. Similarly, the resin and catalyst blend can be manipulated to allow for ideal processing conditions.
Single sided, typically composite tools are used for this process
Hand lay up parts normally have one visible, smooth side. A gel coat can be added during molding to produce cosmetic finished surfaces.