Sanding best practice

The following techniques can be applied when using a de-nibbing process for removal of defects such as dirt inclusions, fish eyes, orange peel, dry spray, etc on freshly applied paint:

 

 

 

-Always complete a ‘thumb’ print test before sanding to ensure the paint is fully cured.

 

-For smaller defects- a de-nibbing block and rose is ideal (1042000)- apply water, then use in a back and fourth motion then wipe any excess dust off before polishing.

 

-With multiple dirt inclusions or heavy orange peel- if a D.A sander is required, try to use dust extraction when sanding where possible.  This will help to eliminate dust which can contribute to ‘ balling’ on the disc and’ pig tailing’.

 

-Farecla  G-Sand 1500 abrasives (1151500) followed by Farecla P3000 (GS3101) are recommended when flatting complete panels.

 

-If you have concerns about ‘breaking through’ the paint on suages, edges and contours, use a fine line or surface protection tape to avoid.

 

-Use a 2.4 mm orbit when D.A sanding to ensure even scratch pattern.

 

-Regularly clean the abrasive disc using a microfiber cloth (Every 10 seconds) this will help to eliminate ‘pig tailing’ and rogue scratches.

 

-Use an interface pad to avoid ‘rogue scratches’ and ensure it’s lined up correctly.

 

-If using ‘wet and dry’ to remove defects, use a block when possible and remember to soak the abrasive paper in water for 20 minutes before use.

 

Pig Tailing = rogue scratches from sanding in the paint caused by grit, dust, or other foreign particles under the abrasive disc and also poor sanding technique, incorrect D.A orbit.

Balling = paint build up on the abrasive disc due to not keeping the disc clean or using dust extraction.

Reference: http://www.farecla.co.uk/

Classroom Finishing