Anyone know what's the cause of this. I thinned it using Vallejo thinner plus a couple drops of flow improver. It just beaded up like oil on water or it pooled up
Winsor & Newton Artists' Acrylic Flow Improver (125ml)
Winsor & Newton WN Acrylic Flow Improver 125 ml, ACFAFI125 : Amazon.co.uk: Home & Kitchen
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Winsor & Newton WN Acrylic Flow Improver 125 ml, ACFAFI125
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Don Suratos aka DC23: Vallejo Flow Improver EXPLAINED!
Vallejo Model Color 17ml Drying Retarder : Amazon.co.uk: Home & Kitchen