rust bleeding through

[gps]

is there anything that can be done to render to stop what looks like rust bleeding through is there a stain block for that nkind of thing

 

[Chris W]

dunno bout render but thomsons stainblock works on skim...
id say if you got rust showing through render its already too late and the next stage is blown corners...

 

[Nisus]

Oil based undercoat or stain block will sort it out :RpS_wink: