Thank you so much for your kind words regarding the use of Net-Trol – we are so glad you had such a positive experience using it. Begin the sanding process with the 80-grit then move on to the 120-grit to get below the most weathered timber (a thorough sanding with both grits is important to get a quality finish)—before moving onto the wood-saturating oil application. Our recommendation would be to purchase a sample of Net-Trol and try it on a small area of the sandstone.

He was going to use an acid based patio cleaner to try to clean it but fortunately I’d read enough online to know that this would probably make matters worse and that net-trol was rated very highly for this problem. Net-Troll can also remove stains caused by tannin bleed and will remove all traces of weathering caused by mildew, UV Rays and pollution. Scrub the surface with a stiff nylon/synthetic brush whilst rinsing with water or use a pressure washer (max. When using a power washer or garden sprayer (Most seals are resistant to oxalic acid, especially in the dilute state) to apply Net-trol, it is important that the Net-trol is not over diluted in the mixing process. I was wrong, the problem was that the dilunett dried out in the sun very quickly on the day I tried it.

There are no known restrictions for using Net-trol on porcelain, but we always advise testing on a small area first before treating the whole area. It is entirely possible that Net-Trol will help with your problem but unfortunately we can’t make any guarantees. The Royal Horticultural Society, and its logo, are trade marks of The Royal Horticultural Society (Registered Charity No 222879/SC038262) and used under licence from RHS Enterprises Limited. It can be used on all species of softwoods including pressured treated timber, larch, pine, cedar etc. It is safe for use on all wood species and can also be used as a neutralizer after using a stripping product such as Prepdeck.

It will also neutralise wood surfaces which have been stripped with a stripping product such as Owatrol’s Dilunett or Prepdeck, leaving the surface ready for applying your chosen finish. They mention it's perfect for removing rust stains from patio, moss killer stains on sandstone patio, and brilliant for cleaning old wood. Lorry deliveries, within 7 working days depending on postcode many local drops are delivered sooner for instance London within 4 working days.The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network. Leave to stand for 10-20 minutes and then scrub with a stiff brush or use a pressure washer to remove.