Observing conditions at night have been terrible lately so I was thinking that observing solar could give me more opportunities. I have a Tasco Spacestation 70mm f11.4. You can find my journey with it here... https://www.cloudyni...n-70mm-x-800mm/
My concern is that it uses a lot of plastic components. The optical tube is aluminum. It has one steel baffle. The barrel on the eyepieces is aluminum. All lenses are glass. However, the dew shield, objective cell, focuser assembly, diagonal, the eyepiece optical cells and housings are all plastic. It is all black too.
I would make a white frame for the solar film that would sit inside the dew shield right on top of the objective cell. A white sun screen would go over the objective cell and get sandwiched between the cell and dew shield to hold it in place. Possibly using a UV/IR filter on the eyepiece too?? But should I even bother??