IDENTIFYING THE SUBSTRATE
THE FOLLOWING SIMPLE TESTS WILL HELP TO IDENTIFY THE SUBSTRATE
| TEST |
RESULT |
NATURE OF SUBSTRATE |
| Rub the paintwork with a rag soaked in |
The paint softens or dissolves |
Nitro-cellulose or acrylic lacquer |
| nitro-cellulose thinner |
and the rag becomes stained with |
|
|
the colour of the paint |
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The paint is not attacked by the |
High -bake synthetic or high-bake |
|
solvent |
acrylic enamel |
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Aged and fully cured air-dry |
|
|
synthetic enamel |
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|
swelling or pickling of the paint |
air-dry synthetic enamel which |
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|
has not fully cured |
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Degraded lacquer finish |
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| Polish paintwork with rubbing |
Staining of the polishing cloth |
Single layer finish |
| compound |
|
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|
polishing cloth remains unstained |
Basecoat and clear |
|
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|
| Flat finish with P600-P1200 grit |
Coloured flatting sludge |
Single layer finish |
| paper |
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Whitish flatting sludge |
Base coat and clear |
|
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|
| Flat finish with P500 grit paper |
finish feels rubbery and /or clogs |
Incompletely cured enamel |
|
abrasive paper |
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