Good morning Kurt.I buy the glass from a local guy here in Cape Town in 1x1m sheets. It costs around R1000.00 per sheet.
I cut the sheets with a knife (if you have a glass cutter it can also used). To get the line straight I clamp a piece of straight wood to the plexiglass and clamped tightly so nothing moves. Very NB. To cut I firmly score the glass along the wood about 15 times. Then place the glass along the edge of a table and press down. The glass breaks along the score line. For the bigger pieces I also score the reverse side and I needed Arlene to help me break it.
Sometimes I had to lightly sand the break edge with 220 grit to remove some slight variations. These are very little and the glass breaks easily and mostly cleanly along the line. You will see in the photo below there is a little sanding on the upper part of the edge.
Here are some pics using my left overs :
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To glue I bought some Methylene Chloride glue (about R100.00) and a syringe. The difficult part was getting large pieces to stay at 90• and exactly along the edge. I used some right angle clamps but I do not recommend the ones I got. There are some seriously good ones on line from Amazon. The longer the better and you need at least 4.
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You can see my clamp (lower right) in the above pic. El cheapo ones from take a lot (SA version of Amazon).
I start gluing a length to a width piece. The glue dries in 30 seconds so I glue approx 200mm long sections at a time. I put a little downward pressure so the glue runs along the entire section. I then place the glued length and width onto the top piece and glue. Repeat for other side.
You have to crawl into some tight spaces

. The glue is super thin and runny and less is definitely better. This “glue” creates a chemical reaction and pretty much welds the sheets together.
My method (as with most of my modelling) is always a bit of “McGyverisms “ as I am tool limited. They came out pretty cool tho.
The best methods are on you tube. I searched for : cutting plexiglass by hand and How to glue plexiglass.
With some of my left overs I just made some covers for my 2 F1 Ferrari’s. These literally took 30 min to make.
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Kurt my methods are not always the best so I do recommend checking out you tube.
Cheers Grant
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