Smoothing out a cylinder and piston?

[lazylathe]

Hi,

I am trying to smooth out a cylinder bore and the piston.
I have center drilled it out and then used a boring tool to get it to the correct diameter.
The problem i am having is it is full of tiny lines and the piston does not feel smooth at all in it!
Is there some sort of tool i can make/use/buy to smooth the bore out?
And are there any recommended lapping pastes or concoctions that work miracles out there??

The piston is not too bad, but whenever i polish it i get a looser fit because os material removal.
I was thinking of the finest water paper as an option??

Still new to this and looking for help.

Thanks

Andrew

 

[Tin Falcon]

Andrew lapping has been discussed here in the past.
general practice is to bore or ream cylinder depending on size then lap smooth then make piston to fit.
A favorite mentioned here is tooth paste
good old lapping compound works as well
as does auto finishing coupound. or metal polish
the whole trick with lapping is use a soft material like wood or lead.
If the lap material is harder than your part the part becomes the lap.
I think all hear who have built an engine has struggle d with the same issue.
Hope this helps
Tin