Best Medium for thining GW Washes - + GENERAL PCA QUESTIONS + - The Bolter and Chainsword

I'm looking to thin a GW Wash Drakenhof Nightshade by about 50% and I know that at that level water will not give a great result. Can anyone recommend a good thinner. I currently have: GW Lahmian Medium Vallejo Airbrush Flow Improver Vallejo Matt Medium Vallejo Thinner Medium Liquitex Airbrush Me

New to weathering - + GENERAL PCA QUESTIONS + - The Bolter and Chainsword

Thinning paints: Best medium? : r/minipainting

Initial Contrast Experiments (from us all) - + GENERAL PCA QUESTIONS + - The Bolter and Chainsword

Washes and faces / eyes - + GENERAL PCA QUESTIONS + - The Bolter and Chainsword

Very Happy With How The Transfers Came Out, Could Do With, 58% OFF

Help a noob with shading - + GENERAL PCA QUESTIONS + - The Bolter and Chainsword

Initial Contrast Experiments (from us all) - Page 3 - + GENERAL PCA QUESTIONS + - The Bolter and Chainsword

Initial Contrast Experiments (from us all) - Page 6 - + GENERAL PCA QUESTIONS + - The Bolter and Chainsword

Initial Contrast Experiments (from us all) - Page 6 - + GENERAL PCA QUESTIONS + - The Bolter and Chainsword

Initial Contrast Experiments (from us all) - + GENERAL PCA QUESTIONS + - The Bolter and Chainsword

How do you add texture to your bases? - + GENERAL PCA QUESTIONS + - The Bolter and Chainsword

Initial Contrast Experiments (from us all) - Page 6 - + GENERAL PCA QUESTIONS + - The Bolter and Chainsword

Best Medium for thining GW Washes - + GENERAL PCA QUESTIONS + - The Bolter and Chainsword

New painter having trouble shading/washing brightly-colored Space Marines - + GENERAL PCA QUESTIONS + - The Bolter and Chainsword