Process Guidance Note 6/34(11) - Defra

SMART spraying
1.14 SMART (small and medium area repair technique) is the spray application of a
surface coating to parts of motor vehicles, usually outside a spray booth or spray
room although often a protective enclosure will be used either with or without
filtration. The parts coated, as part of a repair, should not extend to a complete
panel or panels.
1.15 Typically spraying is by a minispray gun, an air brush or a pre-packaged aerosol
can.
1.16 Due to the techniques used and the throughputs which are achievable it is
extremely unlikely that this activity will use enough solvent within the process to
breach the permitted thresholds within the LAPPC regimes.
Portable spraybooth
1.17 These are fully enclosed inflatable spraybooths which carry out SMART activities.
Portable spraybooths are erected on a daily basis and operate with portable
filtration units which abate emissions from air which is extracted from the
spraybooth.
1.18 Filtration units should be designed to meet the emission limit for particulate matter
in Table 4.1 (without the need for monitoring). The emission point for these units
may be set at a low level.
1.19 Filtration units should operate within a manufacturers‟ designated range. The range
should be visible to the operator through the use of a dial or similar. Maintaining the
unit within the manufacturers‟ range should guarantee the suitability of the unit to
achieve compliance with the limits identified in Table 4.1. Filtration units should be
serviced and maintained in accordance with the manufacturers‟ recommendations
so as to maintain the validity of the guarantee of emission concentration limit.
1.20 When spaying is undertaken in a portable spraybooth the booth should be closed
and the filtration unit should be operating within the manufacturers‟ guidelines. As
with all vehicle refinishing PD-appropriate products should be used.
PG6/34(11) 4