I put on a first coat of Polyx on my fir floor. I am regretting the choice of Satin instead of Matte. I can see it is quite shiny already on the harder/denser parts of the boards and I imagine that the softer areas are going get shiny after another coat. Short of sanding out the satin, are there ways of dulling the shine on hardwax oils?
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The shiny spots are more than likely low spots where the finish has been over applied.
You can sand these spots with 100-120 not necessarily to bare wood just take off the excess finish. Now this part I don’t know will work with osmo but waterlox you can apply a duller coat as your final coat as long as the subsequent coats are applied correctly. So you may still be able to apply your final coat in matte if the sheen really bothers that much.
It is important to stir well since the ingredients that change the finish from gloss settle to the bottom.