Best method / products for refinishing wooden window frames?

[frosenman77]

My wooden windows have been stained before with Cuprinol 5-Year wood stain, but some are now flaking.

Does anyone have any recommendations as to what's the best products to use, and how far back to sand etc. ? Thanks

 

[frosenman77]

Just had a look at Sikkens website, but it's pretty confusing! There are so many products that seem suitable, but I can't make out the differences?

All the application methods seem to assume that you've either used the same product before and you are re-coating, or you are applying on fresh timber!

Can anyone recommend preparation method? Do I need to sand all the old stain off?

Thanks