VALLEJO 73603 - Surface Primer - German Panzer Grey / Schwargrau RAL 7021 60 ml - Exito Model Store
Vallejo Polyurethane - Surface Primer Grey 60ml - Panzer Models
Vallejo Surface Primer – 74601 Grey 200ml | Cottage Craft
Vallejo Model Color 200 ml Polyurethane Primer - USN Light Ghost Grey : Amazon.co.uk: Toys & Games
Fine Surface Primer L - Light Gray 180ml Spray Can : Amazon.co.uk: Toys & Games
Vallejo grey primer - stops your metal models chipping and helps paint stick. Also helps to apply bright/light coloured paints as a basecoat. Because it's runny it allows for rapid coverage yet