Thursday 15 July 2021

Metal work - final spraying?

 When I decided to refurbish the tinware on the Triumph, a friend said I should get it all blasted and powder coated. Then it was an easy matter of filling any dents or pit marks with 2 pack body filler prior to a final spray. He was absolutely right. The powder coated metal work was flatted down first with Scotchbrite pads before any filler was applied. Here are some of the photos:

Above shows after filler has been machine
sanded (mini air sander)

The above shows many pop marks there are 
on some of the panels (where the rust was)

Another view!

Some parts after 1st coat of 2 pack black

The mudguards!

Any pin holes were filled with filler and sanded back. I would have used aluminium powder filler but my tin had gone off. There is an issue, however! It appears I have used the wrong activator for the paint I have and it is taking ages to go off!! So I will leave it out in the sun and then flat back for the final coat - with the correct activator. 
The paint work isn't perfect. I don't want to the bike to look perfect as I want some of the patina / orginality to show through the paint. The odd micro dent will be ignored.
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Around 24 hours later and the paint had not even started to harden. A chat with my local refinishing shop and I was told the only course of action was to remove the paint and start again! 
Half a gallon of thinners and a roll of heavy duty kitchen towel later and the paint was off. It was a messy job but the right decision. I let the paint dry for 24 hours as the powder coating was  softened slighly and then sprayed the 2 pack black again BUT with the correct hardener!! The paint is now hardening and I will give it as final coat after I have flatted back - I feel much happier now!

 

Tuesday 13 July 2021

Further Magneto issues...

 I thought I would investigate the ATD unit that I had before finishing off the magneto. It was very stiff and the weights looked seized. After soaking in white spirit, and then the ultrasonic tank the picture below show the offending parts:




If you look carefully, you will see the cam weights have elongate pivot holes and as a result, the weights have been rubbing on the pivot plate. It doesn't show very well but the lower plate is worn through about half way due ot the fact the weight pivots are so worn. Quite a mess! So I decided to refurb another I have and rivet a new fibre gear onto it. The rivets were 3/16" x 1/2" countersunk and were a perfect fit for peening over. I won't go through the whole process but once the retaining collar is pressed off then it is all serviceable. The damaged gear is shown. I have another magneto with ATD to do so I may show the process if there is any interest. The finished unit is on the left.