[TCML] Why is it important to dry the PVC pipe?

["David Ellstein" <david.b.ellstein@xxxxxxxxx>]

Hi,

I am trying to build my own secondary coils for a Tesla Coil.  I am using
PVC pipe.  I have seen on multiple websites the suggestion or even
requirement to dry the PVC pipe before applying your first varnish coat.
Why is it important to dry the pipe when the wire coiled on it is
insulated?  Does the pipe heat up during the use of it as a tesla coil and
so the water expands and contracts causing holes in the varnish?  Also, how
do you recommend to clean the PVC pipe before applying varnish?  Lastly, do
you have any suggestions on how to wind the coil without a lathe?  Or how to
build a simple lathe maybe even using a power drill?

I hope to hear from you,
David
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