Use your plug the same as they say ,one mounted on a stick. Put the stick through the bottom of a plastic bag & put stick in your vise (bag protects vise) . Brush on a coat of resin & place strips of glass cloth over the plug ,use long enough ones that start on one side & go over middle of plug to other side. Saturate with resin again . Take a child's round balloon blow it up & place the bottom of the balloon on the plug with the glass cloth & press down , as you press release air & let the plug go up inside the balloon until it is all the way on & the air is all out. The rubber puts equal pressure all around plug & makes a very smooth lay up , let harden cut off balloon & trim cowl to fit . May not be perfect the first time but does work quite well .If you use white foam for plug ,gasoline will eat it out. MAX H.