Hi all, advice needed re: dry cleaning curtains. [View all]

I can't seem to find a good answer on-line.
I am in the process of washing walls, DR and LR curtains need to be cleaned. I did the dryer thing a few years ago. OK but this time they need the full Monty.

Do I dare wash them? There is no label. They are lined with a basic cotton looking material. The panels look like an of-white linen/cotton blend. Probably some type of synthetic combination but who knows? One has a water stain. I didn't know a window was open. Left a rusty line on the fabric when it dried.

What say you, do I dare "shout " the stain, soak a while, wash in cold water, hang on the line, then iron myself?
The cleaners in my area want $25.00 a panel to clean. I have a total of 12 panels. Obviously out of my budget.
Scared to try, can't afford to pay.

The curtains are otherwise in great shape.
I need some encouragement...want to do the work myself but am scared I'll ruin everything. Anyone here tried this?