Page 27 - PCMI Journal December 2021

Pre-Treatment – Preparation of Metal Surface
Sean Hill, Product Manager, Eternal Technology Corporation
8/31/21
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Brush Scrub Surface Prep
Mechanical Scrub “Grit” Size of Brush
Abrasive Impregnated Bristles
Scrub” - 320 or 500 grit
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Brush Scrub Surface Prep Foot Print for Mechanical Scrub Brushes
Brush Pressure / Footprint
“Heavy” pressure, pattern is too wide causing ‘smear’ and ‘bowing’ at edges.
“Correct” pressure, 0.25”- 0.375” uniform band full width of panel.
Worn brush in center, ‘smear’ at outside edges due to overpressure.
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Issue 138 December 2021 PCMI Journal 27
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