Hi everyone.

Your mould joins should be all sweet and flush if the original pattern flanging was set up and done right.

How come they are not?

Sorry, the flanges themselves all match up ok, but the joins on the mould surface are a bit uneven, I think I've been a bit rough with filleting the barrier edges. I think its just going to leave thick lines on the joins

Can you not just re-fillet the mould sections before layup?

I just like to understand what you have done.




So when you set up your original splitting flange on your body you made a fillet at the edge it meets the body rather than making it a sharp corner?

Yeah, that's it. I tried smoothing the fillets down fairly small, but not enough. My 20-20 hindsight says I should have used a proper tool to smooth out the joins properly, but its all learning I guess!

Are you making the piece in grp or cf?

That more or less explains what I have, though unfortunately I am looking at doing resin infusion carbon! I'm undecided about painting it, though I'll likely end up with it painted but just with some exposed sections, so if its not a great finish on the joins its not the end of the world.

Plasitcene/wax is really about the only option I can think of, it wont stick to anything so no need to worry about that.

If you tried to use a filler then it will be difficult to get a smooth finish without sanding since you can't sand on your prepped mould! If you could get a filler on there flat then you could tape over it with a gloss tape for a good release as sealing fillers is very risky but this may also cause other issues with your cosmetic finish too. This whole filler approach Just seems difficult and risky.

If you can work around the mould joins with the final finish and exposed carbon sections then the fglass skin across the clear gel coat (or no gel coat) will work fine. You don't need to fglass the whole mould just across the thick wax/plasticine areas.


If these low areas in the flange join are small then filling with fillet wax and clear gel coat over it should be ok. If the wax filled areas are bigger then this could be soft under the cured gel coat which may crack the gel coat and that could then become and air leak through your flange for your infusion job. Air bubbles or a lost part $$??

Got some better pics of the flange join bolted up?