So I've coated my expanding foam background with silicone and eco earth, and while it's worked really well theres some patches where the eco earth is pretty sparse, showing the shiny black silicone behind it, would it be acceptable to put another layer of silicone and eco earth over these patches? I'm not sure if the silicone would adhere to the other layer of silicone and eco earth underneath it as I'm scared the eco earth could become loose and make it fall off...I can post pictures if needed but people talk of touching up empty spaces and I've always assumed this means exposed expanding foam, not patches of exposed silicone?