Kind of like the painters trade union that at least used to prevent certain types of paint brushes for home decoration being sold in the UK. Mainly because it made it too easy for DIY people to do their job for them.
Found out about this in the mid 90's whilst working the summer as a handyman for some rich americans, and being amazed at the great paint brushes they brought with them to make edging on multipane windows much easier :)
Found out about this in the mid 90's whilst working the summer as a handyman for some rich americans, and being amazed at the great paint brushes they brought with them to make edging on multipane windows much easier :)