Hi Kuba,
About the only way to prevent this is to set up your poly coating jig where it can continue to be turned while it is drying. I set mine up with an electric drill and a variac to control the drill speed, since I obviously couldn't sit at the trigger switch of the drill for the few hours that it would require for the poly to dry :-) I left the drill turning with variac turned up just enough to keep it barely moving and let it run all night.
David
Sent from my iPhone
> On Feb 23, 2014, at 5:59 PM, Kuba Anglin <kubaanglin@xxxxxxxxx> wrote:
>
> I recently made my secondary coil (6" x 3') and coated it with several
> layers of polyurethane. I made sure that no bumps formed when applying the
> coats. I started coating pretty late and had to store it for the night in
> my garage. I stored it horizontally. When I woke up, the still wet
> polyurethane had gathered on the bottom of the secondary coil forming a
> line of unsightly bumps across the length. I have some ideas of how I might
> fix this such as using sandpaper or steel wool, but thought I would ask
> first. What should I do?
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