I recently purchased my first jar of SE1 from Silverprint in London but they did not have any of the recommended Jaiban brushes in stock. Since the most important thing seems to be not letting the metal parts of a brush touch the emulsion, I assume I can just use an 'ordinary' brush and be very careful!

So my question is which brushes should I buy? I have access to both a decent art supplies shop and a DIY store and want to coat watercolour paper up to about A4 size.

Can anyone advise me?