Pinewood Derby - Polyurethane as Wood Sealer?

I'm preparing for a Pinewood Derby for the young boys at our church, and getting supplies together, so I can help those boys that may not get the support at home, to build their cars. I'm also

help! how do i paint over polyurethaned knotty pine ?

Everything your car needs for a sleek showroom shine Contains 0.5 fl oz of sanding sealer, 0.5 fl oz of wax and one foam brush Made in the USA

Woodland Scenics Pine Car Derby Sanding Sealer & Wax

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Pinewood Derby Times Volume 13, Issue 11

6 Natural sealant ideas - put to the test!

If I use Minwax wood sealer and then Minwax polyurethane, will

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2008 Pinewood Derby Car (step 7, sanding sealer), Pine Pro …

Torched – Scout Life magazine