I keep my Space Marine, Eldar or fantasy Empire banners mostly grim and serious. But dwarves have this over-the-top grumpiness combined with a passion for down to earth, beer-soaked humour that just doesn't work taken with a straight face. As the vertically challenged ones wear simple, unfunny outfits the best place to display their attitude are their standards
The best tool for paint stripping in my book is... brake fluid. The one used in cars. You can buy it at any gas station and at many run-of-the-mill supermarkets. It is designed not to damage metal car parts or plastic pipes but also to prevent corrosion and remove impurities.