Yes, I use the brushes from the
Airfix starter kits as well, and I think they're quite good
I haven't had much success with very cheap brushes, they tend to splay very quickly, or the bristles fall out as I'm using them
Although that was years ago and they probably had dirt cheap natural fibres, or the early synthetic, perhaps they've improved
I do use one cheap brush though; a soft #8 natural fibre that I've had for years, I use it to sweep off dust & filings when I'm filling & sanding joint lines
But as I mentioned I've just ordered a few more brushes -
From
www.artsupplies.co.uk a couple of W&N Professional Watercolour Synthetic Sable
From
www.jacksonart.com a couple each of -
Rafael 8404
W&N University
I noticed they had DaVinci Colineo Synthetic Sable on offer, don't know anything about then, but I thought I'd try those as well
I too cut down old worn brushes for stippling/mottling and dry brushing
I've seen Pink Stuff on t'Net, but you've got to draw the line somewhere
EDIT - I've just Searched for the Pink Stuff on t'Net and it's a general cleaner, so I might get some anyway, and I can use it around the house - and if it's as good as they say, I can spend less time cleaning and more time on model making