Re: Polystyrene knobs and button repair
I'd have thought the best thing to glue polystyrene parts together would be 'polystyrene cement'. (airfix glue). This stuff does slightly dissolve the plastic together.
If you need to reinforce any polystyrene broken bits on anything, you can buy it in sheet, rod, pin, shim or strip form including the correct glue from modelmakers' supplies shops. Anyone familiar with model train magazines will have seen adverts for Plastikard...they're still going and have a web shop.
ABS plastic can be welded with the stuff you get for water pipes. This appears to be a solvent with a gel thickener.
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Kevin
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