This will suit "Off Topic"!!
Not exactly coffee related, but thought since there is so much experience here with restoration of metals, might ask anyway....will understand if its too far from the topic of coffee and gets deleted.
Im restoring a motorbike that has been siiting outside, uncovered for the past, oh, 17 to 20 years less than 500metres from the ocean :(
The engine is fine ;D
The body and alloy is not so fine :( :(
Could anyone please give me some advice in regard to restoring the alloy - I have tried sandblasting and it does help, but of course doesnt leave me with the deisired finish. Im beginning to think Im going to be spending $100s on wet and dry.
Heres an example of what Im up against...and a bit of before and after, though even the after still needs more work
Id try contacting this mob in the UK and see if they are willing to make some suggestions on what to do and what to use. Ive received very helpful advice from them in the past a couple of times,
There are a few places around who will polish those for you, but it will cost you. If the detail is not too intricate then you can use wetndry with some brasso. By using progressively finer grades (say up to 1200), you can achieve an almost mirror like finish. Autosol works well too.
The other thing is to never "sandblast" alloy as its just too harsh. A better option is plastic bead or glass bead blasting instead.
Finally, if the corrosion has made too much of a mess to polish out, then consider the plating option...aahhh Chrome!!!!!
Much of this sort of work Dennis is straight elbow grease. Wire brushing by hand, wire-brushing via electric drill attacments, steel wool, wet and dry paper. Cutting compound pastes.
Im cleaning up miles of brass L -sections used as trim around furniture on my boat. They are an awful brown colour. I put a few lengths in a 60ml diameter plastic downpipe with one end sealed, and fill with citric acid.
That strips much of the discolouration, then I finish with steel wool or wet and dry before polyurethaning. They come out gleaming brass.
Much easier than your project, though Dennis.
Oh, and as a token nod to this forum about coffee --- you then have a well-earned espresso.
Mal, Flo and Robusto
Thanks for the advice - I was hoping for an easier solution but for the most part, wll probably need to continue with the elbow grease option. I only want to send out what I realy have to as the satisfation of taking it for its first outing will be far greater - its just not the same when you buy the restoration.
Will check out the website and definitely give the citric acid a go - do you know if it can be purchased by the kilo? ;) I know phosphoric acid will work but it discolours the alloy :(
Yes you can mate,Originally Posted by Dennis link=1175051769/0#5 date=1175086854
Try visiting a couple of specialist Beer Brewing Supplies type shops and Im sure theyll have plenty..... and cheap,
Careful with the citric acid.... do a test first, as aluminium alloy may not be too fond of it. *Might be all right, and if so, as Mal says it is available in beer brewing supply shops -- much cheaper than the $1.70 for 90 grams at Coles
I vote for the bead blasting too (glass bead).
...but you will have to pull the whole motor apart to get a good job!
Yeah Andy, I guess deep down I know that ;) - if I go this way I would drop the motor out of the frame and that might give sufficient access without stripping too much more off while I send the frame away and have it powder-coated.Originally Posted by Andy Freeman link=1175051769/0#9 date=1175123456
Would ultimately like it to be in concourse condition, so this is gonna be a very long-term project! ::)
I dont have any resto. tips, but are they by any chance the covers of a Plastic Maggot? If they are, youll know what Im talkin about! Good luck finding parts if so......
You clearly know youre bikes ;)
Main thing I need is an exhaust system - may have to get something tailor made for that, and a seat - shouldnt be hard. I still see sales of parts from time to time so not too concerned.
And Phil - you almost live around the corner from me ;)
Well, one or two of them anyway!Originally Posted by Dennis link=1175051769/0#12 date=1175335896
Almost around the corner, eh? If the bikes paintwork is black, it might be an old friend of mine!