26 Mar. 1998|
Black marks on varnished wood,free plans for building a tiny house,jorgensen pipe clamps woodworking - Try Out
Black stains and other wood finishes are commonly used on interior and exterior wooden beams, decking, real wood flooring, engineered flooring and barns.
The fantastic thing about black is that it provides brilliant contrast and considerable drama. Its not recommended to use Varnish on top of Laminate Floors as it tends not to adhere for very long and will peel and flake.
I stripped the lacquer off with "Dad's Easy Spray" stripper, washed it with paint thinner, sanded completely every square inch of the wood, prepped for spray application and applied two coats of water-base "Aqua Guard" clear coat. The marine industry is a great place to research when moisture abatement is what your after. If you have a question regarding a Knowledge Base article, your best chance at uncovering an answer is to search the entire Knowledge Base for related articles or to post your question at the appropriate WOODWEB Forum. Dark black stains in wood furniture, especially on tabletops, is typically caused by water. I have used this product to remove dark stains on many different pieces of mid-century teak furniture, which typically has an oil finish, rather than varnish.
If you wish, you can first apply a small amount to an inconspicuous area of the wood surface, to make sure it does not have a negative affect. If you notice any subtle lightening of the normal wood color in the area of the stain as a result of the application, you can apply a coating of the paste to the entire surface being treated, so that the color remains consistent over the whole surface as the stain is being treated.
Water contains trace particles of iron, which reacte with the tannins present in wood, creating a dark stain.
If your dark stain is under varnish, you may have to strip off the varnish layer before you can chemically treat the stain.
The oxalic acid in Barkeeper's Friend cleaners is also very useful for removing metal pot marks from porcelain kitchen sinks, as it eats away these metal markings. Although depending on the size of the damage you could consider using a black filler such as Osmo Wood Filler to repair the damage. I recommend epoxy to stop moisture intrusion, then top-coat with something from the marine industry. Strip, wipe with vinegar, wipe with alcohol, stain to desired color and Man' O' War spar varnish is what "nearly" every boat owner and exterior door finisher here in South Florida uses.
I would guess the steel wool caused the black marks, if they won't wash off with detergent I would use a mild oxylic acid solution.
Getting that end-grain or anywhere that wood meets metal to be water tight is going to be a chore, but you can fill the holes without any severe alterations to the overall look. The black spots are underneath the clear finish and not superficial so bleaching is not effective. Since it is such a soft wood, you may be able to get by with just a large syringe driven directly into the wood, but holes are better.
If the door wasn't cleaned off well, then the new coats will pull tiny particles together into clumps, but oxidizing to black not red is sort of weird.