The use of a naked flame in a workshop where much dust is present is
fraught with danger.  I have had great success with using a damp cloth
and a hot iron.  (If a plugged-in electric iron is used this also has
its problems and the iron must be disconnected from the power supply
when being used).  I have used this method for laying and removal of
veneers and it works well with leather.

For a glue pot I use a coffee percolator, a glass jar with a copper
or brass wire loop around the neck holds the glue jar suspended in the
water in the coffee jug.  This system does need some additional help
to initially melt the glue if you want to make a quick start, this can
be done by starting with boiling water in the coffee jug.  No danger
of overheating the glue.

To reduce evaporation of the water cut a hole in the jug lid to allow
the jar to pass through also a lid on the glue jar with a hole large
enough for the glue brush to pass though keeps the dust out

Coffee percs are to be found at car boots for as little as 50p, here
in the UK, that is.

Arthur Nichols
West Mids UK