Master spray job

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roganjosh
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Master spray job

Post by roganjosh » Wed May 30, 2018 7:25 am

I picked up a couple of empty Master 128 cases last year. Both are very yellowed. One of them has obviously had something with a straight edge put on top such that half the case is yellow and the other cream. I suspect that such a two-tone case will not respond well to RetroBrite treatment, even multiple ones, and so am considering painting it. Given its condition and its 'spares' status it would be a harsh person who considered that a very sacrilegious act.

Search terms in this forum have produced limited suggestions for doing so; I'm therefore looking for advice from any others who've managed to achieve the look of an original Master using (e.g.) an ABS-safe spray paint. Particularly,

a) Colour: I see that someone has successfully used RAL1013 (Oyster White) for an Arc. What would be the best make/colour for a Master? The same?

b) Primer: Are there any recommendations for a primer?

c) Finish: I see that there are Matt, Satin & Glossy variants of 'ralcolour' sprays. Which would give the most natural finish (including what type of varnish [e.g. clear acrylic] if Matt is used)?


Alan

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lcww1
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Re: Master spray job

Post by lcww1 » Wed May 30, 2018 9:25 am

You could always try retrobrite first - if it doesn’t turn out well, then you can still paint the case!

I’ve retrobrited a Master case with acceptable results, but see this thread (and others on *.) for more info: viewtopic.php?f=41&t=13438

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sirmorris
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Re: Master spray job

Post by sirmorris » Wed May 30, 2018 9:42 am

I use vinyl dye to colour plastics. It apparently bonds with the plastic rather than covering it, so it doesn't chip or peel. It also doesn't affect the texture of the surface you're painting as much as a regular paint. The colour range is slightly limited though, and it's more expensive. Still worth considering imho.

https://www.vinyldye.co.uk/All-Vinyl-Dye-Color-Sprays

roganjosh
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Re: Master spray job

Post by roganjosh » Wed May 30, 2018 4:37 pm

Thanks both.
I RetroBrited both my Masters last summer and they turned out pretty well. However, they've subsequently re-oxidised, even though they've been kept away from direct sunlight. It seems they do, as some say, need a protective varnish; in effect a paint job. That's why I'm interested in exploring the direct paint route as an alternative since both methods would both seem to compromise the initial state of the case, but the paint might end up giving a better finish.


The vinyl dye approach sounds good sirmorris and, as you say, would do a good job in preserving the texture. Given that colours shown in browsers are often not representative of the actual colour, may I ask which one you think gives the most Master-like effect? I'm assuming it would be their 'Bone' shade. I'd also appreciate knowing whether you subsequently treated them with their Matte or Glossy 'add-ons' (as they seeem to call them) to get a more original-looking effect.

Alan

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sirmorris
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Re: Master spray job

Post by sirmorris » Wed May 30, 2018 4:44 pm

I've never used bone, and I'm always happy with the finish as-is so I can't be any help there I'm afraid. Sorry :(

steve3000
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Re: Master spray job

Post by steve3000 » Wed May 30, 2018 5:04 pm

roganjosh wrote:
Wed May 30, 2018 7:25 am
I picked up a couple of empty Master 128 cases last year. Both are very yellowed. One of them has obviously had something with a straight edge put on top such that half the case is yellow and the other cream. I suspect that such a two-tone case will not respond well to RetroBrite treatment, even multiple ones, and so am considering painting it.
I've retrobrighted a few like this. Particularly bad are sticky labels that have been placed on the top or side of a computer or disc drive back in the 80's and protected a credit-card sized rectangle from yellowing over time - it looks awful after the label is removed...!

I just apply the retrobight mix to everything apart from the non-yellowed area and after a couple of goes the result can be surprisingly good. I'm sure I have some photos of a particularly bad disc drive I did earlier this year, will post them up if I can find...

steve3000
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Re: Master spray job

Post by steve3000 » Wed May 30, 2018 5:42 pm

tn_DSCF3753.JPG
Disc Drive
tn_DSCF3755.JPG
Label gap up close
tn_DSCF3757.JPG
Process
tn_DSCF3763.JPG
Result

pcbbc
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Re: Master spray job

Post by pcbbc » Thu May 31, 2018 11:41 am

Does the use of the blonde dye also increase the double the "density" of the drive to 80T? :oops:

roganjosh
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Re: Master spray job

Post by roganjosh » Thu May 31, 2018 12:31 pm

Impressive peroxy acid job. Do you varnish things afterwards (if so what make/type). I may get the marigolds out again, however I don't wish to hijack my own thread so am still dyeing (apologies) to hear peoples' experiences with original-look paint.


Alan

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z0m8ied0g
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Re: Master spray job

Post by z0m8ied0g » Thu May 31, 2018 3:56 pm

sirmorris wrote:
Wed May 30, 2018 9:42 am
I use vinyl dye to colour plastics.
I've got a set of these that i'm intending to use on my BBC master, its going to be black with a white owl logo across the top.
I'll let everyone know how it turns out.
Acorn... lots of Acorn... http://blog.retroacorn.net

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