am wrote:
I am painting an aircraft using Randolph butyrate dopes. The thinners
(reducer) is on a long back order in the UK. Is there any other
thinners, available in the UK that I could use?

here is the MSDS for a competitor's Butyrate thinner:
http://www2.siri.org/msds/f2/bjz/bjzsf.html
You could have a chemist make you some, but the proportions are not
given by this MSDS....

Certified Products out of Los Angeleles makes dope for Aircraft Spruce,
check their UK distributor, or try Sig Hobby products UK distributor
for sources.

Skycraft seems to have some Butyrate thinner in stock:
http://www.sky-craft.co.uk/acatalog/...vents_191.html