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Group: Moderators
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I can answer alot of your questions as ive been and tried them.
you may have less problems than I had due to the very thick wall you are producing, I only wanted a 1mm wall thickness.
I used a 450mm long x 100mm dia polished alloy tube as the mandrel to produce a 400x100 tube and this gave me my first problem of not enough over hang to make working comfortable so give yourself a little extra mandrel length than you think.
first trial was waxed mandrel, total fail and could not remove the tube.
second was easy lease plus un-perforated film and again total fail.
third trial was Vaseline plus un-perforated film and total success.
first trial was using heat tape and hot air gun the rest were using shrink tube and hot air gun.
only issues with the shrink tube were its expensive and could give a few small faults to the finish due to the shrink tube being supplied flat, this causes uneven shrink at the folds when shrinking.
other issues are putting too much heat into the work, its very easy to do this and causes the shrink tube/tape to melt (total fail in finish) and causing the resin to boil again complete scrap.
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