BTW
Some more thoughts
1) The Remah says befeirish that kitniyos-oil can be used to light candles so obviously it isnt muktzah (its quite the stretch to say he means only chol hamoed and at nay rate obviously there is no difference between chol hamoed and yom tov regarding issur kitniyos)
The mishna berura seems to find the mere fact hat can light with kitniyos so obvious that , he exaplians the Rema’h chidush as being that the kitniyos can be mixed with water.
2) Rav Yitzchok Elchanon was among the gedolei poskim of the 19th century and held derivatives of kitniyos example corn syrup as opposed to corn are muttar. Obviosuly Klal Yisroel did not accept this pesak but it seems funny that not only arent derivitives mutar but even belyios that are pagum will assur food (ie need to kasher keilim after they re aino ben yomo) . ITs possible, just seems funny