Hey People,,

Here's a quick one thats hopefully straightforward?

My problem is, I am making a  plug and getting ready to take the mould. The plug is pretty much a rectangular cube which I'm gonna do in 2 sections, 3 sides of the box per mould.

Now to make the mould I've stuck on some corrugated card to act as flanges that block off the parts I do not want to use yet. So the question is, how do i stop gelcoat getting between the card and the plug? There's very little room to use modeling clay as it will get in the way of the defined corner.. Do I pull the card away a little and then fill the gap with clay, just behind the corner?

Or do  I use nothing at all and hold the card in place (its stuck on with double sided tape, i'd just be holding it to stop it flexing too much) whilst applying the gelcoat, using any lines created as guide lines when I trim the part??

I can post any pics if needed, just let me know!

Thanks for your help!

Rob

Filleting wax is far superior to modelling clay, both in how nice it is to use as well as how well it works. Definitely do yourself a favour! 

For release agent, I do all my coats of chemical release agent before applying filleting wax or clay. Then I do a couple coats of release wax, which cleans up any residue in the process. You should also be fine to just lightly buff the residue off, but I do like to do another coat afterwards - you can never be too careful with release agent!

Hey Hanaldo,

Good to hear from you.. Hope you're well and thx for the reply!

Ok great, pretty much what i've done, although I've stuck with the clay, will be upgrading ASAP though!! Horrible stuff!! :p

Can I ask, when you're sticking your flanges on, whats the preferred method of attachment, hot glue or double sided tape, or c something else??