Cutting parts old MTB

I want to make my python.
Python is lowracer.
Python lowracer
We can't buy it. The way to get it is making it by myself.
In the site of above link, we can read the process of making python.

I try it !

At first, I bought 2 old MTB which frames made from Iron. Each one's price is about 20 euro. I paid 40 euro for them.

Next, I took their parts down and cleaned them.

The cleaner is one for toilet. It includes hydrochloric acid.
For quick job, it is warmed up by hot water. It took about 30 minutes.

I cutted usable parts from MTB's Frames.

Such parts are drop outs and Bottom Branckets and seat stays, etc.

 Then these parts also are washed.

Before:

 After:

To taking some parts down, I needed some special tools.
Such tools are expenshive in here.
So I buy them from abroad, U.S.A and China.

And I need recutanglar tubes. I can't get any one with exact same measurments.
I order similar ones.
For example, Sandou Iron shop. During waiting those materials, I will be able to do something.