This Geologist Jerry and I ran an analytical lab for years My specialty is sand and I've seen this issue numerous time before Assuming you had a good quality sand (think nice beach or sand dune sand - not the crushed dirt 'play sand' sold at home improvement stores) then the thing to remember is the grains themselves can't absorb water so all you have to do is dry ,..
The same rules apply when you're using a palm sander: sand with the grain and hold the sander flat against the wood while applying even pressure Removing the Dust Wood dust from sanding will cause problems if it's not removed from the surface before staining Dry rags or brushes aren't the most effective tools for removing dust Instead, use a tack ,..
How to Prevent Blotching Using a Washcoat - Wood End Grain ,
You can apply the washcoat just to the end grain if that's the only area that you need to control stain penetration Don't worry if the washcoat gets on the flat surface of the wood when you apply it to the end grain, just let it dry and then sand the flat surfaces using a sander or sanding block to remove the sealer..
Sand Sieve Analysis of Biosand Filter Media - Clean Water The biosand filter requires a certain range of sand grain sizes to effectively treat of very dry sand for analysis that is representative of sand to be used in a filter..