How do i clean concrete from grain of door?

country home

Front door, dark grean, ,, almost like a blackgreen .. .

its not bad but once i started it, it just seem to get worse when it dryed out. . ..

its in the grain, . . . .:mad:

I have tried sponging it down, ,,

i have tried hose and paint brush. ..

now ill try after lunch . . nail brush, , , it has slightly stiff brissles. .

all experience will be much appreciate it. . .

Jnealon

I had a similar situation with my windows, I used santrax mixed with water at a ratio of approx 4:1. I sprayed it on to the window and you could see the concrete disolve and the varnish remained intact, then rinsed with water

Disclaimer
This stuff could easily ruin your door so use with caution

michael999999

.im a painter and i see this problem a lot on new build houses where they have not sealed the timber before plastering.
i really dont know of any way of repairing it as the concrete burns into the grain and leaves a black stain.