By Kevin Burns - 2/6/2019 10:06:03 PM
Can I fill in voids with more resin and then sand it down? The structure is sound, I’m just trying to clean up the appearance mostly. Should I use infusion resin for this or a different epoxy resin such as a wet layup?
How to achieve voids in your next part:
While making my first project, a car bonnet, I made errors using the unimould system that left my mold from being airtight. Despite knowing my result would be less than desired when my vacuum bag wouldn’t hold a perfect seal, I proceeded, primarily to continue the process and see what other mistakes I could make hands-on. To compensate for the slow leak I left my vacuum pump running overnight as the resin hardened. The end result (rather predictably, but not so obvious to me at the time) was that resin was sucked out of the corners of the mold due to the continuous vacuum. This effect was most noticeable in places with the sharpest corners where I thought I had seated the fabric into the mold but did not do so adequately.
Ultimately I’ll be remaking the bonnet, but I’d like to make this first attempt presentable and ideally get it installed on the vehicle so I can really see how it looks.
Thanks in advance for the help.
Kevin
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By Warren (Staff) - 2/7/2019 11:24:10 AM
Depending how bad it is, if it is just a few small voids, fill them in with resin, maybe in a couple of passes if quite deep, until it is just proud of the surface. Once cured you can sand it flush with the surround and polish back to a gloss finish.
If you are worried about the bag leaking in future, ensure there is a good resin break/gap between the end of the mesh on the part and the vacuum port. That then drastically slows or even stops resin making its way into the vacuum port.
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