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moonpie - 8/6/2020 10:00:23 AM

Well I bit the bullet and moulded without PVA. The plug had taken many months to model so was a bit nervous about getting either the mould or the plug out in one piece but decided to use wax on the top half of the plug and ez-lease on the bottom half. Both released from the plug well although the plug broke into three pieces coming out of the mould. The ez-lease half was done with 8 coats and released with no adhesion. The wax half was done with 10 coats and picked up a tiny piece of the plug in a tight area of detail but pretty good all told.

Now the bad bit! The flange created on the first half moulding I treated with 8 coats of ez-lease. When trying to split the mould the flanges were effectively bonded together so I almost had to cut them apart to get the two halves to separate. That leaves me with a big job now to re gel coat the damaged areas, something that never seems to give me a hard workable surface even using 2% wax in the gel coat mix. A long road now to build up the gelcoat and sand it flat with it clogging the sandpaper so quickly but on the up side, the mould surface itself is spot on!

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ats101 - 9/1/2020 6:30:56 PM

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moonpie - 8/6/2020 10:00:23 AM

Well I bit the bullet and moulded without PVA. The plug had taken many months to model so was a bit nervous about getting either the mould or the plug out in one piece but decided to use wax on the top half of the plug and ez-lease on the bottom half. Both released from the plug well although the plug broke into three pieces coming out of the mould. The ez-lease half was done with 8 coats and released with no adhesion. The wax half was done with 10 coats and picked up a tiny piece of the plug in a tight area of detail but pretty good all told.

Now the bad bit! The flange created on the first half moulding I treated with 8 coats of ez-lease. When trying to split the mould the flanges were effectively bonded together so I almost had to cut them apart to get the two halves to separate. That leaves me with a big job now to re gel coat the damaged areas, something that never seems to give me a hard workable surface even using 2% wax in the gel coat mix. A long road now to build up the gelcoat and sand it flat with it clogging the sandpaper so quickly but on the up side, the mould surface itself is spot on!

Hey man, when I touched my mould up with gelcoat without wax additive, I left it in the sun and cured nicely and quickly. I used an eletric detail sander