Not after every coat as they go on so thin you would just strip the last one or three off without realising it.
Best to get a few coats done and the finish will kind of tell you when it needs a light sanding, usually between 4 - 8 coats.
Have since read about the wet sanding with TO application method and will be giving that a go on my latest build after around 3 or 4 coats have sealed in the colour scheme.







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