Welcome to the Workshop community @DBHector. I'd be happy to answer your question.
If you are planning on painting with a light shade of colour it would be well advised to go with Zinsser cover stain as it will effectively block any residual stain from showing through. This an oil-based product and will require an oil-based topcoat.
If you have stripped the stain completely and it is back to bare timber you can use Dulux Weather Shield directly onto the timber.
If you have other questions or need further information on these products, please let me know.
Mitchell
