NOVELTY - Compression molded article comprises a polymer component and 1-45 wt.% of a glass bead or fiber reinforcing component optionally distributed in the article. The polymer component comprises 80-100 wt.% of high-density polyethylene based on the weight of the polymer component, in which at least 20 wt.% or more of the high-density polyethylene is post-consumer high-density polyethylene.    USE - The compression molded article (preferably a flat, square or rectangular sheet and panel) is useful as: a corrugated panel or embossed panel for forming a boat hull, aircraft hull, automotive component and reaction vessel; a solar panel for a solar cell; and a laminate that is useful as a truck or trailer bed, interior or exterior building wall and a surface of a temporary structure (all claimed), where the panel is useful in building constructions such as roofing, floor tiles, exterior and interior finishing products and siding, ceiling tiles and shingles.    ADVANTAGE - The compression molded article has improved mechanical properties, stiffness strength, resistance and long service life and reduced labor intensive and material costs.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a corrugated panel or an embossed panel thermoformed from a panel;    (2) a boat hull or aircraft hull or automotive component or reaction vessel thermoformed from the panel;    (3) a solar panel comprising solar cells disposed in a single layer on the surface of the panel;    (4) a laminate comprising two panels and a third polymer layer sandwiched between the panels;    (5) making a plastic article comprising (a) making a mixed melt comprising the polymer component and optionally 1-45 wt.% of a glass bead or fiber reinforcing component, (b) transferring the mixed melt to a machine press with a forming die comprising a square or rectangular cavity dimensioned to produce the plastic article, where the mixed melt is delivered to the cavity in a quantity sufficient to form a plastic article, (c) compressing the mixed melt in the forming die with the machine press to form the plastic article, and (d) cooling the plastic article;    (6) recycling post-consumer plastics waste comprising recovering from the waste a fraction comprising the high-density polyethylene, making the mixed melt comprising a high-density polyethylene fraction and the glass bead or fiber reinforcing component, and the steps (b)-(c) as above per se; and    (7) increasing the modulus of a recycled plastic article formed from the mixed melt comprising the post consumer high-density polyethylene polymer component and an amount of one or more polymers including polyethylene, polypropylene and low density polyethylene that is sufficient to reduce the modulus of the article below 150000 psi comprising adding to the high-density polyethylene polymer component, prior to the formation of the mixed melt, an amount of a radical initiator effective to provide an article with a modulus of greater than 150000 psi.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a compression molded article.    Hopper (10)    Mold (12)    Extruder (50)    Accumulator (52)    Piston. (55)