Just lay a wash over the whole background (If you’d like some practice with washes, see my post: https://www.

Only add a drop or two, if you add too much water, it will affect the properties of the masking fluid and it will be difficult to remove once dry. Remember that if you are working with negative space, as in the example below, you will apply the masking fluid to the gaps between your different subjects.Stir the art masking fluid thoroughly to ensure it has an even consistency before you begin using it. It gave the best result when painted over another colour but the fact it spread and was thicker so hard to apply resulted in the lower rating. Apply masking fluid with applicators that come with the bottle, an old brush for larger areas, or a palette knife, wooden cocktail stick or Colour Shaper, which are ideal for intricate detail, including grass and rocks. Another thing with masking fluid, you don't want to scrub too hard on it with your brush, or you will lift it up. You can also get masking fluid products that have a slight tint, which is used to help you apply the fluid more easily to the white paper as you can see what you are doing.

Remember that masking fluid applied on top of a previously painted area will very likely lift off some of the paint when removed. If you need to squeeze the bottle to encourage flow then you must be sure to squeeze very carefully and gently. That's my favorite to use, but there's many different types of masking fluid, several ways to apply masking fluid.Over time it becomes harder to remove, and because masks usually contain a pigment to color them, you run the risk of staining the white paper, which kind of defeats the purpose ! This was left to dry before some of the tape was removed on the boat and the masking fluid in the lake was rubbed off gently.