Products having a wood grain appearance, and methods and structures for use in forming same

A structure for use in forming a plurality of products having a wood grain appearance, said structure comprising:

• a plurality of overlapping extruded layers comprising different colors/shades, said plurality of overlapping extruded layers together being spirally wound about a longitudinal axis of said structure towards an outer surface of said structure;
• wherein said plurality of overlapping extruded layers comprise varying thicknesses along a spiral length of said plurality of overlapping extruded layers towards said outer surface of said structure and/or portions of said plurality of overlapping extruded layers encircling said longitudinal axis comprising portions disposed at different distances from said longitudinal axis along a spiral length of said plurality of overlapping extruded layers towards said outer surface of said structure;
• wherein said plurality of extruded layers comprises first, second, and third extruded layers, said first extruded layer comprising a first thickness and a first color/shade, said second extruded layer comprising a second thickness and a second color/shade, said third extruded layer comprising a third thickness and a third color/shade, said first thickness being greater than said second thickness and greater than said third thickness, and said first color/shade being lighter than said second color/shade and said third color/shade;
• and
• wherein portions cut longitudinally from said structure having said plurality of spirally wound overlapping extruded layers form the plurality of products having the wood grain appearance.