Transparency

The original finish or undercoat is visible through the topcoat.

Cause:

1. Colour not thoroughly stirred/agitated.
2. Colour over-thinned/reduced.
3. Substrate not uniform in colour.
4. Wrong colour undercoat used.
5. Insufficient number of colour coats applied.

Repair:

1. Apply additional coats of colour until hiding is achieved.
2. Or, sand and apply similar coloured undercoat/ground coat and refinish.

Prevention:

1. Stir or shake paint material thoroughly, making sure all pigment is in solution/suspension.
2. Thin/reduce according to product label directions.
3. Use a sealer or ground coat to provide a uniform colour before topcoating.
4. Use an undercoat that is similar in colour to the topcoat.
5. Spray until hiding is achieved.

Note: Spray monitors (hiding power labels, opacity charts) provide a contrasting feature by which to observe the hiding power or transparency of topcoat colour during spray application. When black and white can no longer be seen through the colour complete coverage is achieved.