I've been making flange out of chopped strand matt for years but I must say sign board is cheaper and  nothing bonds to polypropylene making your own costs more and you can't cut with blade,so I recommend sign board.  

I've been making flange out of chopped strand matt for years but I must say sign board is cheaper and  nothing bonds to polypropylene making your own costs more and you can't cut with blade,so I recommend sign board.  

Oh what I'd give for a compressor, spray gun and somewhere to use it...

glad i could help trying to find useful info and share it here. and having the info plus being able to see someone
do it--is priceless!
long live the black arts !!

CarbonFiberCreations

Thanks, that really helped. Never really though about using strands of woven glass fibre for edges and ripping up CSM. Looks like I'll save some money by not buying the putty. 

i think this guy is an experienced mold maker. looks good and clean and no repeating steps.
well done

CarbonFiberCreations

part two

CarbonFiberCreations

GREAT video of how to for a flanged mold .
i first thought the use of fiberglass to make his edging material was not a good idea, but actually it was brill.
i think we all should be sure to keep some FG and Polyester around for this sort of use.

[YouTube]http://www.youtube.com/watch?feature=endscreen&NR=1&v=gzng9HeGNPE[/YouTube]

CarbonFiberCreations