by side and the areas 12 and 14 include a reinforcing material 19 for example a porous wire mat onto which the spray cast alloy was sprayed the reinforcing material 19 may be located where the areas 12 and 14 touch and may extend for some distance into the areas 12 and 14 fig4 illustrates an exemplary spray casting apparatus 20 such apparatus 20 comprises an upper chamber 22 optionally closable for atmospheric control in which a melt of metal alloy or polymer is prepared for spray casting onto a forming surface or mold die cavity 24 in the shape of for example the door inner panel 10 in another embodiment the surface may be a metal stamping or a polymer shape that has the minimum thickness and minimum strength properties of the desired vehicle closure panel a higher strength material is sprayed over portions of the metal stamping or polymer shape to locally strengthen those areas referring again to fig4 depending on the composition of a specified metal alloy or polymer the upper chamber 22 may be adapted to accommodate vacuum melting or melting in a protective gaseous atmosphere of the sprayable composition when a suitable melt has been prepared molten metal or polymer material may be drained from a melt crucible 26 into a tundish 28 for melt spraying the melt crucible 26 and tundish 28 may be located in the upper chamber 22 in this embodiment spray castable material then flows down into a lower chamber 30 in which spray casting onto the forming surface.