Here's a review of some white gel pens, white markers, paint and ink I've used for my watercolour sketches. These are great for adding highlights, especially drawing into tiny areas where it would be extremely difficult to do so with a watercolour brush. These are very convenient. For pens and markers, you can just uncap and use. There's a huge variety of products that use
White Gel Ink Pens - 0.8MM Fine Tip, for Artists, Drawing, Sketching, Black Paper, Pack of 6: Buy Online at Best Price in UAE
Pen Review: White Pen Comparison: Sailor Mini Correction Pen and Uni Posca - The Well-Appointed Desk
Bianyo White Gel Pen Set, Pack of 7 in a Zipper Pouch, 1.0 mm Bold Line, White Ink, White Gel Ink Pens for Arts and Crafts, Taking Notes,
Bianyo White Gel Pen Set, Pack of 7 in a Zipper Pouch, 1.0 mm Bold Line, White Ink, White Gel Ink Pens for Arts and Crafts, Taking Notes, Medical
White Pen-Touch Fine Paint Pen, Hobby Lobby
White Paint Pen, 8 Pack 0.7mm Acrylic Paint Pens Acrylic Markers 6 White 2 Black
PINTAR Black & White Markers/Pens for Rock Painting, Wood - Pack of 18, 0.7mm/ 1mm/ 5mm, 1 - Kroger
8 Foolproof Paint Markers and Paint Pens for Rocks - Carla Schauer Designs
Sun-Star Twiink Twin Ink Marker - Tokyo Pen Shop
Pilot G2 White Barrel Fashion Collection Gel Pens, Fine Point, 0.7 mm, Assorted Ink Colors, Pack of 5 - DroneUp Delivery
Haile White Marker Paint Pens White 0.7-2.0mm Oily Waterproof Permanent Plastic Gel Pen for Car Tire Painting Graffiti Markers
5pcs White Marker Pen Alcohol Paint Oily Waterproof Tire Painting Graffiti Pens Permanent Gel Pen for Fabric Wood Leather Marker - AliExpress