Alright, here's what I do with sticky stuff --
Tube glue, the traditional 'polystyrene cement' isn't a popular as it was, but I still prefer it for large joints like wing halves and wing - to - fuselage
Liquid glue - I prefer Tamiya or Mr Hobby as -
The bottles are squat and less likely to be knocked over
The brushes are fine
They don't have those irritating & fiddly tamper proof caps
I just top them up with bulk liquid glue
My own mixture, which is a bottle of liquid glue with a few pieces of clear sprue dissolved in it
This makes it slightly thicker, but not as thick as tube glue; I use it for most small & medium parts
There's no recipe, just add a few pieces of sprue till it's right for you, remembering, of course, that you can add the sprue but you can't take it out
Canopy glue - I still have some Kristal Klear, but there are other types, or PVA wood glue
Tube putty/filler - I still have some Squadron Green Putty, not sure what I'll use when it runs out, so any recommendations would be appreciated
Mr Surfacer & Mr Dissolved Filler - as far as I can tell, they're more or less the same
They are fillers, but thinner than tube putty, and you paint them on with a brush
The problem is that just like paint, the filler will dry & harden on the brush, so there are some options -
Clean the brush in a suitable solvent, which is fiddly
Use a disposable brush or a cotton bud
Use an empty liquid glue or nail varnish bottle - apply the filler with the cap brush, then return the brush to the bottle, which acts as a keeper
Don't worry if the bottle is not absolutely clean & spotless as all these solvents can be mixed with each other
I keep my tubes of glue & filler in a glass jar such as a tall one that has held pickles or posh jam, to reduce any drying out of the tube if the fit of the cap isn't too good.