panel fastening ideas

I would like to add some lightweight insulation and interior panels to
my tube and fabric aircraft.  Any good ideas for attaching the panels
without having visible fasteners?  I'm thinking something like those
plastic automotic clips... but not.   They always seem to break off in
my cars.  Even more so in the plane since the panels get removed every
year for inspection.  I can weld on little tabs if needed.  Any ideas?