Fix up a Conn 36K

nycbone · Post by **nycbone** » Mon Jul 28, 2014 6:52 pm

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Minkrott · Post by **Minkrott** » Sat Aug 02, 2014 4:46 pm

Finished painting my 1960 36k this morning. There were multiple coats under the circus colors. The bell is rough but it looks nice from a distance.

nycbone · Post by **nycbone** » Sat Aug 02, 2014 5:03 pm

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iiipopes · Post by **iiipopes** » Sat Aug 02, 2014 5:45 pm

Looks great!

Minkrott · Post by **Minkrott** » Sat Aug 02, 2014 6:19 pm

nycbone wrote:Looks great!

Which paint did you use?

Thanks. I used Rust-Oleum Satin Enamel directly on the stripped surface. I tried Krylon semi-gloss for plastic on a previous Tuba, but it was still tacky 3 months later.

bighonkintuba · Post by **bighonkintuba** » Sun Aug 17, 2014 12:04 pm

My 70's 36K bell is in excellent shape (no chips/gouges/major scratches) but the plastic (ABS?) bell flare section has yellowed.

Is Rustoleum paint suitable for this type of plastic? What sort of surface prep would be required? I would be masking the fiberglass (paint is in nice shape)/metal section and painting only the plastic.

Any experienced advice regarding prep/paint would be appreciated.

Minkrott wrote: Thanks. I used Rust-Oleum Satin Enamel directly on the stripped surface. I tried Krylon semi-gloss for plastic on a previous Tuba, but it was still tacky 3 months later.

P@rick · Post by **P@rick** » Tue Aug 19, 2014 3:12 am

bighonkintuba wrote:My 70's 36K bell is in excellent shape (no chips/gouges/major scratches) but the plastic (ABS?) bell flare section has yellowed.

Is Rustoleum paint suitable for this type of plastic? What sort of surface prep would be required? I would be masking the fiberglass (paint is in nice shape)/metal section and painting only the plastic.

Any experienced advice regarding prep/paint would be appreciated.

Don't paint it. Wet sanding with fine grit sanding paper will bring back the white(isch) plastic. The yellow discoloration is only on the surface area.

bighonkintuba · Post by **bighonkintuba** » Tue Aug 19, 2014 5:43 pm

Interesting...

What is the texture/appearance of the surface after sanding? Do you have any close-up pictures?

Thx!

P@rick wrote: Don't paint it. Wet sanding with fine grit sanding paper will bring back the white(isch) plastic. The yellow discoloration is only on the surface area.

P@rick · Post by **P@rick** » Wed Aug 20, 2014 5:20 am

bighonkintuba wrote:Interesting...

What is the texture/appearance of the surface after sanding? Do you have any close-up pictures?

Thx!

The plastic part of the bell is “just” plastic. There are no surface layers so you won’t change the texture/appearance of the surface after sanding. But you need to use very fine sanding paper. In case the surface texture is too rough after sanding just go over it again with even finer sanding paper. Wet sanding will give the best result.

And if you don’t like the end result you can still paint it together with the rest of the bell and body.

I like the result on my bell in general. Unfortunately my bell was painted black and in some areas where the bell has deeper scratches the black paint is still visible. I intend to paint the body and bell completely so that’s not a problem…but I have more and more doubts whether I should sand it further and leave the plastic part of the bell unpainted (like original)

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Fix up a Conn 36K

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