sections of the pressed in fabric laminate strips 12 or the fabric laminate layer 14 become impregnated with the underlay compound with which the grooves 10 are filled as an alternative to this the fabric laminate strips 12 or the fabric laminate layer 14 can be pressed into the grooves 10 first followed by a step in which the underlay compound is applied to the base 2 that has been prepared in this manner and permeates into the grooves 10 with the fabric laminate strips 12 or fabric laminate layer 14 that have been pressed in in sections in addition the fabric laminate strips 12 or the fabric laminate layer 14 can be pressed in using a tool with the pressing in of fabric laminate strips 12 or of a fabric laminate layer 14 in sections the fiber ratio can be increased to up to 80 which results in a further increase in strength and stability below reference is made to fig5 through 8 fig5 through 8 show surface profiles of surfboards as specified in the invention the maximum roughness depth is shown as a vertical distance between the highest and lowest point on the filtered roughness profile within the sampling length in this the surface profile shown in fig5 has a maximum roughness depth of 118 5 u03bcm while the surface profile shown in.