What about grease & oil?
The items to be cleaned should be as free from grease as possible, as large amounts will degrade and slow down the cleaning process. Unlike bead blasting, soda will not get stuck in the greasy corners.
Also by using soda, the process of blasting converts these residues into soap like material called saponification
Preparation is usually minimal as the soda causes no damage to the surrounding environment and leaves very little residue as it disintegrates on impact.

Masking or tenting is always advised if there is sensitive equipment nearby.
News:
Yacht owners can rest easier these days, now that Soda-Blast-Systems are able to provide their environmentally friendlier anti-fouling service across an increasing number of marinas.

By using Soda-Blast-Systems a 35ft yacht with a 9ft beam can be strip and ready for painting in under 4hours.

Soda-Blast-Systems out perform alternative methods due to the inherent properties of the Soda and the delivery system used by the Soda-Blaster.
Clean up & waste disposal?
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The owner of the sandblasting company was to be in breach of Section 2(1) of the Health and Safety at Work Act (HSW Act) for failing to ensure the health and safety of employees; three breaches of the Section 33(1) (g) of the HSW Act for contravening enforcement notices; and two breaches of Regulation 4(1) of the Control of Substances Hazardous to Health Regulations 2002, for using a prohibited substance.

After pleading guilty he has been fined for six health and safety breaches after exposing employees to silica. The fines total of £26,000, Hyndburn magistrates said they had considered a custodial sentence. As well as the fine, the owner was ordered to pay £24,000 costs.
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