Re: Repairing '55 Clipper seat panels

Posted by HH56 On 2017/7/11 10:03:24

The plaster would need to be thoroughly dry, sealed with shellac or varnish and then coated with a release agent before any fiberglass is applied.

The nice thing about the vacuum bag method is an ordinary pump used for evacuating A/C systems could be the vacuum source. It is a bit small and would take longer than a commercial vacuum source to evacuate the bag so a slow setting resin might be an advantage. I use my AC pump and a modified ordinary paint pressure pot to do vacuum degassing of regular casting materials without any problems. The pump and pressure pot were Harbor Freight products.

The plastic used for the bags is available by the yard and with something that small it shouldn't take more than a couple of yards plus the sealing tape and a fitting for the pump to attach.