rear site advice

[lonerider43]

guys,i have an older gehmann D75 variable rear site thats as stiff as a board to turn.
any ideas on what to clean/lubricate it with ?

thanks in advance.

sean.

[MR.Sako]

get some acetone and automatic transmission fluid, mix 50/50 and soak it. give it a couple of turns every couple of hours to clean the gunk out.

[lonerider43]

thanks MR.S
wont acetone eat the finish off the metal ? [and the painted dots]

thanks

sean.

[MR.Sako]

It might, give it a try on a spot you dont mind rubbing off. I think the atf sort of neutralizes the acetone a bit.

[lonerider43]

thank you.