Another useful and highly effective way to clean resin chairs is by car wax.
Car wax on resin furniture.
Resin on furniture is non pigmented paint.
I would stay away from using wax.
Patio furniture is always exposed to the elements.
Sunshield combines uv inhibitors along with a unique blend of carnauba wax beeswax and orange oil to protect the natural beauty and depth of grain in outdoor wood furniture.
There used to be waxes for resin furniture but if you can t find them use a car wax.
The great advantage of all of this work is that you have a really nice feeling chair the wax makes it silk like comfortable on bare skin and you can repeat the process for years if you like.
It may also make the furniture too slippery and cause someone to slip right out of a chair.
A pressure washer or even taking the chairs to a car wash for a professional washing is also helpful in the event that none of the methods mentioned above work.
Sunshield should be used regularly or whenever outdoor furniture looks faded or dry.
Oxidation commonly occurs on outdoor furniture such as resin plastic chairs and is caused from prolonged exposure to the sun.
Applying occasional coats of boat or car wax to the chairs will protect them from future oxidation.
I would pick a carnauba based wax just for the hardness.
It can happen to almost any material that is left in the sun for long periods of time including aluminum fiberglass and even car paint.
And are you referring to the no silicone on bare wood.
This distinctively blended product effectively penetrates and replenishes natural oils.
An appropriate amount needs to be applied on the chairs and then buffed so no residue remains.
So use what ever you have.