We recently bought a second-hand summerhouse, which we have put up in our back garden. The structure is sound but it was treated with either creosote or substitute about 5 years ago and then left. I appreciate I can't get rid of the creosote but I would like to try and stain it a more pleasing colour, such as dark red. I have seen some advice from a site in the USA that recommends linseed-oil-based stains but I can't find any in the UK. Can anyone recommend a method or product that would allow me to stain the wood dark red? The wood and creosote is well weathered and has gone quite light in some places.
Any help or advice gratefully received.