You cant get a good bond using finishing resin unless you do all layups wet which is an exercise in retardnessĬhasing squirmy wet pieces of cloth around is just plain wrong The wax excludes the air so it will harden unsticky Last fill of cloth is with finishing resin which has wax on board

'do 4-6 layers for a decent structural deal Use some very fine cloth to fit the sphere easier Then just fill the glass by dabbing into the cloth with wet brushĮxcess resin decreases strength the resin has no real structural value other than bonding layers Then with clean bare hands smoth cloth down and it will stick and form to the spherical shape smoothing it with fingers It will be like flypaper and hours later another layer of laminating resin will bond ,unlike finishing resin in layers =no bond ie wax The only way to do it and do it easy ise use laminating resin for the layups you brush paint on a layer then let it kick off It seems pretty straight forward.Īny tips or hints? It is about 21 square feet of surface and I'll probably need two or three layers. I bought a 30' diameter, inflatable, PVC exercise ball for a mold. Original: I'm making a radio-controlled ball. Maybe the foam micro-balls? I don't know. But spray foam doesn't sand very well, does it? Bondo would be heavy. I'll then be able to cut it in half and then figure out a way to mount the halves together so I can install the motor and electrical gear.Īnyway, I was thinking of using expanding spray foam to create a layer and then sand it out. I'll finish a frame tomorrow where I can rotate the ball on bearings. I found the 'poles' and put a piece of all-thread through it. So, now I need ideas on what to layer it up with to 'round it out'. I didn't take into account the way the ball would flatten under weight. Seeing as how the ball deforms under weight, the ball didn't come out at spherical as I was hoping. Edit: I had a local fiberglass shop make me a ball using the exercise ball as a mold.

2 glocks on a hamsterball