Scrub 2 large Russet potatoes well, leaving skins on if desired.
Slice potatoes into 1/16-inch thick rounds using a mandoline or sharp knife.
Rinse slices thoroughly under cold water until water runs clear to remove excess starch.
In a large bowl, combine 2 cups white vinegar and 2 cups cold water.
Submerge potato slices in the vinegar bath and soak for 30–60 minutes.
Drain potato slices and lay them in a single layer on towels; pat completely dry on both sides.
Heat 4 cups vegetable oil in a heavy-bottomed pot or Dutch oven to 350°F.
Working in small batches, fry potato slices for 3–5 minutes until golden brown and crisp.
Use a slotted spoon to transfer chips to a wire rack set over a baking sheet to drain.
Immediately sprinkle hot chips with 1 teaspoon fine sea salt and repeat for each batch.
Let chips cool completely before serving; store leftovers in an airtight container at room temperature for up to 2 days.