If you want to use a fountain pen and paint watercolour washes over the top you have to purchase special ink for your pen as standard fountain pen is water-soluble. The good news is there are a number of water-based permanent inks that are suitable for use in fountain pens and that become permanent once
Fountain Pen Sketching Part 3: Using a fountain pen - Liz Steel : Liz Steel
Identifying plants and using a waterbrush - Liz Steel : Liz Steel
Kakimori nib with watercolour 'ink' - Liz Steel : Liz Steel
Current Sketching Kit - March 2021 - Liz Steel : Liz Steel
Last week: Coffee, fountain pens and violet ink - Liz Steel : Liz Steel
Art Tools of Liz Steel
Seven Coloured Ink Sketch (or Was It Eight?) Liz Steel Liz
Final daily sketching kit - Liz Steel : Liz Steel
Brown Ink - Liz Steel : Liz Steel
Summer Break 2019-2020: Part 1 - Liz Steel : Liz Steel
Seven Coloured Ink Sketch (or Was It Eight?) Liz Steel Liz