I opted for Plascore core material. The supplier said I could install it in as small of pieces as I was comfortable with. Since the balsa was 2-3/4” wide planks, I figured my plascore install might be similar. Once I saw how easily the material conformed to gentle curves I decided to go 2’x4” sheets.
First I word things down with acetone, then wet the hull and plascore with resin. Then I applied poly silk putty with a 1/4” notched trowel.
After two sheets it was apparent to me that doing the whole deck at once would be easiest overall.
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I learned that thinning the putty with resin and applying to the edges with a chip brush was quick and easy. I wish I had planned out more weights to hold it down. I managed but more plastic tubs filled with screws and stuff would have been simpler than a scavenger hunt for “something heavy”.