| Never mind Tiger you have re-discovered the method ! we used to make our very own balsa cement the same way,simply dissolve acetate scrap in acetone,leave overnight and add more acetone to the desired consistancy,this makes the best cement you can get your hands on,also plastic wood can be made easily by adding sawdust to the mixture and stirring in,make sure the lid is on tight and invert the container to make sure air does not get in,this is particulary useful these days, as commercial plastic wood is now water based and made from polyvinyl acetate and not cellulose solutions,like a lot of others I prefer the old mix,it sets like rock !
Adding gypsum to the solution makes for a finer filler that can be filed once dry.
Like you say we expect things in tubes and tins these days ready formulated,but not always the best product,go homebrew and not only save money but customise your products.
Keep experimenting and save those jam jars with screw top lids,they make idea storage for these brews,smear a smidgin of vaseline around the thread to avoid locking up.
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