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11th December 2015, 13:00 | #11 |
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when remocing deeper pits and scratches (upto 0.5mm deep) then you need to remove that as a uniform layer across the whole light to prevent lensing.
This of course removes a thin gel like coating which can burn and build up on the lens if you have the abrasive moving too fast. A good finishing compound like £m headlight poish and protect will leave some protection in the fine surface, but a sprayed on clear coat alowed to go very hard before fitting may be the best long term protection... i am experimenting with that now...
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11th December 2015, 21:34 | #12 |
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As there have been some interesting points on this thread I have added a link to this into the How To
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11th December 2015, 22:14 | #13 |
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Are we missing the point?
My understanding is that QH bulbs generate excessive UV which is usually filtered out by the glass housing. These days the housings are not glass and I doubt whether the 'plastic' (may be the wrong term for polycarbonate) filters it out. Hence the UV protection. I was buying MR11 QH lamps for a fibre-optic decoration a year ago and the spec. included 'UV stop' or something similar. The MR11 includes a reflector but these didn't have have a glass on the front so obviously no filter. The seller sent some with the glass front but I haven't worked out a simple method to check that the filter works. Any ideas? Have a look at this link, particularly the the paragraph titled Spectrum. https://en.wikipedia.org/wiki/Halogen_lamp If you haven't got the QH headlamps then I wouldn't bother about the UV protection, but if you have then think about the other drivers' eyes. Pete |
12th December 2015, 08:37 | #14 | |||
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Quote:
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TC |
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15th December 2015, 16:53 | #15 |
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Many thanks for this and good to get an update on X383! Edward
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16th December 2015, 00:23 | #16 |
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T-Cut, might have to throw away my headlamp bulbs in the bottom of the box. Yes, they appear to have UV filtering these days.
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17th December 2015, 01:36 | #17 | |
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Quote:
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17th December 2015, 06:17 | #18 | |
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Quote:
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17th December 2015, 09:19 | #19 |
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17th December 2015, 09:33 | #20 |
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Its just clear lacquer, the trouble is if you get a stone chip, that will let moisture underneath and it will look unsightly again.
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