[Aeroclassics]

Marty,

I am certain the you sell a high quality product, it was not my intent to disparage your products in any way. Just remarking that his are the smoothest I have seen. That statement should be qualified by saying I have not seen yours as of yet.

Doug

[Aeroclassics]

There is a fellow who sells Basswood, Butternut and other woods under the name of Uncle Al. That is the smoothest material I have ever laid eyes on and would not need any sort of sanding prior to use. I know we carry it at the Woodcraft in Plano, TX. So other Woodcraft stores might also carry it.

Doug

[Aeroclassics]

Wide thin boards are guaranteed to cup or warp. Even though the board is all one piece it will absorb moisture at varying rates depending on the time of the year. This is why table tops etc. are usually made up of boards not more than 4” wide. Sealing helps but on very thin boards can induce warping as the sealer may not be absorbed at the same rate.

Marty made a good suggestion about wetting the cupped side. Since you have sealed the board I would try laying a damp towel over the cupped side and use a warn iron to try and remove the warp. I would also find a way to clamp the board after ironing so that it is “over bent”  as that may help compensate.

Doug

[Aeroclassics]

Guy,

Sounds like you have gotten the best advice. All I could add is Oxalic might help or as you have been told, sodium hydroxide or bleach. If the board is not already thins and off the mildew might be easiest as long as the wood is good and dry.

Doug

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