On 24 Apr, 10:15, Mike Harrison wrote:
An idiot subcontractor decided that instead of using the glue we supplied, *

Make it their problem. They replace or pay for the tubes and contents,
then it gets done again.

I've tried some RS cyano debonder I had to hand, which does appear to make a fairly good job of
removing it, but we will need something resembling a 2 foot long cotton-bud to get to it....

2 foot cotton bud? Probably double ended strings to a swab that's
pulled through.