Thnx I'll look into those.Just a point of reference rather than a recommendation:
I've happily sprayed guitar bodies with a 2HP / 25L compressor like this (not this exact one, but they're generic):
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Einhell TC-AC 190/24/8 24L 2Hp Air Compressor
• 2 Hp oil lubricated motor• 24L air receiver• Air displacement: 5.8 cfm• Max. operating pressure: 8 bar• Wheel mounted with pull handle• Compressor oil sold separately, code (code 94582)The Einhell TC-AC 190/24/8 is a versatile air compressor. With a maximum operating pressure of 8 bar, the...www.toolstation.com
And a small 'detail' spray gun like this:
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HVLP Mini Gravity Spray Gun - 0.8mm Nozzle - Spray Gun Shop
Blue Mini HVLP Gravity Spray Gun – 0.8mm Nozzle – WH-H2000P This mini HVLP Spray Gun is ideal for coating materials with paint with minimal wastage. The plastic cup capacity of 125ml is ideal for smaller projects or those with a large number of colours and finishes. Specifications: Operating...www.spraygunshop.co.uk
(Again, not that exact one, but something very similar.)
I imagine that the projects you're looking at would have similar requirements. (If you can afford / have space for a compressor with a bigger tank, then that would be a worthwhile upgrade.)