Topic: Clear coat needed for sanded engine covers???

[Elniniomuchachos]

I sanded my disgusting looking 550 sprocket, alternator, and clutch covers. I gave them that nice brushed look, now I was wondering if I need to clear coat them or if they can be just left alone. I don't want them to look shiny. I like the dull brushed look I have going on.

Thanks for any help.

_elninio

[harisuluv]

Not really necessary.  It seems to be an individual preference.  The finish will sort of fade/tarnish over time, but then again clearcoat will also do the same and turn yellow or something.  I think if you just hit them with some hand polish once a year or so they should retain the look that you want. 

[TwoTired]

The aluminum alloy will corrode when exposed to the atmosphere and elements.  That is why they were clear coated from the factory.
The two part clear coats don't yellow.  If you can get acrylic enamel in clear, it won't yellow either.


If you don't coat it, you will need periodic "sandings" or polishings to make it like like you like it.  The frequency of upkeep will depend on what the aluminum is exposed to.

The cast parts aren't guaranteed to be without voids.  So, don't be surprised if one of your "sandings" exposes a void or bubble/split in the casting.

Cheers,