polishin

[zeroed]

today i tried to polish my cases with a needle gun does anyone know how to get millions of craters and pimples out

http://www.archivehive.com/wp-content/moon-craters.jpg

[Pigford]

MIKEY (hes only in Bristol) is your man......

[Pigford]

.........also, I believe if you bung it in the "dishwasher" it can change the surface features on metal

[zeroed]

i think it`s too late for the dish washer, and i havn`t got one ..just gonna stick `em in the microwave for 5mins, might soften the metal








..oh dear

[tlc]

Give `em to Mikey for 5 minutes.

He`ll sort `em.

[zeroed]

i used to live in Bristol might take a ride/drive up there sometime

[Ginger Bear]

Yup,
You need some of that good ol' ''Mikey Magic''. You'll think he's given you back somebody else's cases.

[Ginger Bear]

Ooo Er, I've turned into a 'Custard Cream'

[zeroed]

quite getting into stripping bits off and re-spraying, polishing and spending money , addictive isn`t it

[mikey]

120 grit sanding disc on a sander plenty of ALBO grease not elbow grease, ALBO grease and keep the face of the disc flush with the casing face so you dont ripple or ridge it.
ALBO grease keeps the alloy from running hot and dry and dragging the base metal.

[zeroed]

Albo grease ok, thinking of buying a polishing kit from a site recommended here, normally use autosol, and fine emery on scratches, hard work tho

[mikey]

Zorded the operation i have described to you will leave the base alloy extremely rough, its done to cut out all the corrosion and any deep marks and should only realy be done if you feel confident of bringing the base alloy back to a mirror finish, its a bit to involved to explain it all here.
And when you doing this op go easy where the cases are stamped D.O.H.C as you will take it out and any chamfered edges as they will lose their shape, not trying to put you off mate just advising you.

[mick znone]

some of the comments on here are useful and informative, but some of you regular posters [ you know who you are ] think you are funny, well you are, you make fun out of an otherwise stressful situation, as a lot of you guys seem to be around 40 to 50 years, i think its amazing that you've not let life stifle your youthful outlook, as life can throw so much at you, i respect the fun element in this club and i look forward to seeing you guys at some meets. AND YOU KNOW WHO YOU ARE

[Kev1R]

Over the years I have had this experience with a couple of the DOHC engine cases which become slightly scored – most recently when I got off the bike & forgot I had a back pack bungeed to the back seat! - over it went --- much to the amusement of the only pedestrian for miles around (I was somewhere in the middle of Wales at the time)

I gave it some thought as to best way to recover the surface and decided this would be extremely difficult, as it is not simply a case of polishing (pardon the pun).
In effect - There is now no metal where metal should be !! - ok only a fraction of a millimetre, but to get it looking like it was, you would have to move the aluminium around. So polishin' ain't gonna work!

Someone here is going to tell me there is an easy fix - but my solution was to wait till I could afford it & buy new case.
I suppose engine cases which have the structural integrity of soft cheese is a recipe for an accident, - no matter how careful you are, if you use your bike - they will get marked eventually. I personally do not like engine bars which I think detract from the lines of the engine.
Sorry this might not be much help - but I think it would be easy to spend the cost of a new engine case on repair.

[mikey]

Polishing will work but you blend rather than polish