I am working on a project where I need to stain a birch dowel to a dark brown natural wood color. I tried my normal Varathane Dark Walnut stain (an oil-based stain which has worked really well for me in the past on both poplar hardwood and Baltic birch plywood), and for some reason it turned out horribly, much lighter than in past iterations and really blotchy / streaky. Looking into ways I can fix this.
A friend recommended trying a tea staining method like the one described here, which uses a chemical reaction between black tea, vinegar, and steel wool: https://www.js2partners.com/amp/how-to-distress-wood-diy
My question is whether the fact that the wood has already accepted an oil stain will prevent this from working. Please advise.