The earliest clear online references I found are from 2004, with the technique (often called “Miracle Dip” or similar) already described as well-known by then. It was in use earlier than that, possibly in the late 1990s as your 2012 TMP poster claimed, but verifiable public online mentions start around 2002–2004.73
Key early findings (in roughly chronological order):
- ~2002 (HAT.com tips page): Explicit mention of the “miracle dip” method using Minwax brand oak furniture stain/varnish (a Polyshades-style product). It notes that it “deepens the colors, settles darkly into folds, and provides a tough glossy coat to figures. Fast and easy.” This aligns with the dipping/sealing approach for miniatures.78
- February 3, 2004 (The Miniatures Page): In a thread on speed-painting Napoleonic minis, a user refers to the “well-known ‘miracle dip’” involving basic block painting followed by a dark Minwax wood stain product (or equivalent). This confirms it was already established in wargaming communities by early 2004.73
- 2005 (BoardGameGeek and RPG.net): Mentions of using Minwax Polyshades for simultaneous inking/dark-washing/sealing on minis (e.g., War of the Ring figures) and brushing/dipping it on figures. One RPG.net post from January 2005 discusses brushing on Polyshades instead of dipping.75
- 2006 (Heroscapers forum): Discussion of a dipping method with Minwax Polyshades (recommended Tudor shade) by user jgklaw, with links to earlier examples on CMGRealms/MKRealms forums. This matches the technique exactly.85
- 2007 (Bell of Lost Souls): Detailed tutorial on dipping Orks with Minwax Polyshades Antique Walnut Satin, treating it as an established “Hive Fleet in a Day” style technique.45
Later references (2010+, including your 2012 TMP link) build on this, often comparing it to Army Painter QuickShade (which was marketed as a more convenient version of the Minwax dip). Some users claimed personal use going back to the late 1990s, but I couldn’t find public online corroboration predating ~2002.4
The method seems to have spread through hobby forums, personal experimentation with hardware-store products, and word-of-mouth in wargaming communities (especially for batch-painting hordes or quick armies) before becoming widely documented online in the mid-2000s. “Miracle Dip” was a common nickname for the Polyshades approach. Pre-2004 mentions are sparse likely because many early discussions happened on now-defunct forums, email lists, or in-person at game stores/conventions.