Layups for beginners are easy.
Get this stuff ;
Flat sheet of glass about 300mm square and get it really clean and dry.
one meter of fibreglass cloth - preferably stuff thats not been folded into a tiny square, ugh..
500mL tin of polyester resin + MEKP catalyst (Repco et al)
75mm ish plastic scraper (Mitre 10 et al)
ten small paper cups (beg some off your mobile espresso vendor)
a bag of ice block sticks from the supermarket
Sharp box cutter
Clean and dry 50mm paint brush (cheap one)
Material called Tafetta - cut to 30mm larger than your fibreglass cloth square. You can skip this stuff if you like, but its the fun part I reckon.
To do a trial learner-layup ;
Cut out three squares of glass cloth 1cm larger than the glass square and set them down where they wont get get dirt on them or get knocked on the floor.
Get a clean paper cup and ice block stick and put two fingers (only!) of resin in the cup, and when you are ready, set the resin off by adding catalyst and stirring it in promptly. Don't whisk it or you will add lotsa bubbles. Scrape the sides and stir in well. 60 seconds stirring time ish.
Spiral half of the catalyzed resin onto the glass and spread with the scraper. Drop a layer of cloth accurately into place and tamp it down with the tip of the brush - try not to wet the brush. Scrape (with the scraper!) the cloth down gently until it goes clear-coloured. You dont need much resin! Add another layer of cloth, tamp down, and scrape until the resin comes through. If the layup wont wet properly, then add a little resin. Overall, you will be surprised by how little resin you need. Make sure each layer is fully transparent and wetted (no opaque dry spots) before you add another later of glass cloth. Repeat for all the layers, making the last layer a little wetter. If you run out of resin (you will) use a clean cup and stick and make a fresh batch. Dont make large batches! It will go off in the cup in only minutes coz of the heat it generates.
Now lay the Taffeta over the top and stretch it out and tamp/scrape it down quite firmly. Resin will come through this new layer.
If the layup is not starting to set after 15-20 mins, the put the whole layup somewhere warmer (15 degC ish).
Once it starts to set like firm toffee, use the sharp box cutter to knife the edges along the edges of the glass. Skip this step if your layup is much smaller than glass. Be careful, the spikes are sharp.
Leave it until its fully set hard, 2-5 hours depending on temperature. Best leave it until the next day.
Peel the edge up carefully on the taffeta and tear it back - sticking-plaster stylez.
Slip a blade in between the layup and the glass pane, and seperate the two, and carefully pull them apart. Sand the edges smooth and you have your first practice layup.
Using a release agent (like PVA glue, but solvent based), you can mold a part off anything at all using the same or similar procedure. Glass doesnt really need a release agent coz glue has problems sticking to it anyway.
Corrections invited. Abuse will be completely ignored.
Fibreglass is fun.
Steve
"I am a licenced motorcycle instructor, I agree with dangerousbastard, no point in repeating what he said."
"read what Steve says. He's right."
"What Steve said pretty much summed it up."
"I did axactly as you said and it worked...!!"
"Wow, Great advise there DB."
WTB: Hyosung bikes or going or not.
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