Preliminary work before glazing the wooden staircase

However, if you do not want to completely remove the old varnishes from a standstill, you must know whether these old varnishes were solvent-based or solvent-free (water-based). If you use an exactly opposite glaze (solvent-free on solvent-free and vice versa), this can cause the glaze bubbles or causes uneven discoloration - depending on which product you want to glaze on the oppositely applied glaze.

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