The Humbrol Maskol Masking Fluid 28 ml for masking areas requiring protection during painting. It is great for use with masking any models before painting. It really is a top quality product and comes highly recommended for all model making applications. The New Improved formula has a reduced odour. Note that Humbrol Maskol can be used on Humbrol Enamel Acrylic paint, including Humbrol Acrylic Sprays.