[Rebel1]

The amazing thing about mixing your own filler as described by vettestr is that it is so cheap compared to purchasing pre mixed fillers.

I purchase plastic bags of light weight filler powder from a marine merchant. I buy it in 1/2 KG (1lb approx) plastic bags and it is a mixture of micro balloons and fumed silica. The stuff is so light that a 1/2kg bag is pretty big.

You would be surprised how far this stuff goes when you mix it with your chosen resin. Further more, you can mix to the consistancy you desire and with a much higher quality resin than normally used for bondo/Bog.

I purchase my resins from a resin specialist..not the local hardware.

You can also add milled glass to the mix if you want an increased mechanical/tensural strength. When mixed with vinylester resin this mix will hang on well beyond the destruction of surrounding panels.

Cheers