Removing / Cleaning Old Interior Water Stains

[Jay Boucher]

Since COVID will keep me house bound this winter, it seems like a good time time to tackle some interior water stains. 

I've owned my kit-built, Northeastern Log Home ~6 years now (originally built in 2005) and I believe they are stains from the prior owner (it was a short sale).  I've since had the exterior sanded/refinished/sealed buttoned up some flashing and haven't noticed any new stains. 

My interior is natural (light) and just sealed.  I've read a few posts that suggested light sanding and bleaching followed by interior stain/sealant to match. I may need to do large sections to have it all match but that doesn't bother me.  Most of mine will be handled by sanding/sealing but I have some pretty stubborn stains around one southern facing window that might require a more aggressive approach. 

I appreciate any additional advice, especially for stubborn/deep/dark stains... 

Thanks in advance and hope you are all safe and healthy!