Pick Up going slightly micro; non-potting solutions?

Gassage

I've two guitars where the pups are going eversolightly microphonic.

One is a single bridge tele, the other is an HB.

I hear you can use shellac or insulation tape to fix?

Thoughts?

Alegree

Bad ideas.
One is likely to destroy the pickup, and the other will achieve nothing.

p90fool

I've flowed candle wax into a gap between the baseplate and the bobbin on a Tele pickup with good results. I didn't pot the windings at all.

With a H/B it could be a variety of things, from loose bobbin screws to a cover which needs clamping properly when being resoldered, ie not necessarily microphonic windings. 

ICBM

Try putting some foam rubber under them in the cavities - it will damp out the vibrations a bit.

Funkfingers

How is the Telecaster pickup mounted? Using metal springs or sections of rubber tubing? The latter method may dampen unwanted vibrations. 

Voxman

If your p/ups have gone microphonic you really need to have them repotted. Although you can try repotting p/ups yourself, it's fiddly and you could damage your p/ups unless you know what you're doing.  The good news is that its not expensive to have the p/ups professionally repotted - my local guy only charged me £25 for two p/ups.