Old diecast toys - Dinky etc.

Old diecast toys - Dinky etc.

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Red Firecracker

5,276 posts

227 months

Tuesday 28th February 2017
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Yertis said:
OK I have some caustic soda, and another couple of questions for Red.

1. How much caustic soda should I use in say two pints of hot water?

2. About how long are we leaving the plastic bit in for?

3. Would you spruce up the clear plastic with Klear? (or the Humbrol version in my case)
Fill your container half way with boiling water and then sprinkle in a little caustic. It'll foam up and then die down, so do that a couple of times. Err on the side of not enough than too much every time. The less you put in, the longer it'll take to strip the paint, but the less likely it is to eat its way through your metal casting! Red is tricky colour anyway, so you will be left with some powdery residue, but a good scrub in clean water with an old tooth brush is the step straight after the caustic. I used to then give it a wire brush once it was dry as a final step before priming.

Once the mixture is cool/cold, you can leave the plastic bit in for as long as you want. It'll still have some 'oomph' left in it, but obviously if you dump the glazing into the hot water, you'll end up with a blob.

I used to polish the glazing with Autosol or similar to give it a final clean. I tended not to go as far as using Klear as you don't want to take away the visual effect of the glazing. It should be a bit chunky rather than finessed down with Klear, if you get my drift.


Yertis

18,046 posts

266 months

Tuesday 28th February 2017
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Excellent – many thanks. That pic up-thread of the Hornby Dublo Duchess has inspired my next die-cast dunking exercise too.

Yertis

18,046 posts

266 months

Wednesday 1st March 2017
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Made a good start tonight, getting the 'glass' out without breaking it a bit fiddly (nasty rivet as RFC had warned) then used a bit of paint restorer on the chassis and some Autosol on the wheels. Glass cleaned up fine too!

Red Firecracker

5,276 posts

227 months

Thursday 2nd March 2017
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Good stuff!

PH5121

1,963 posts

213 months

Thursday 2nd March 2017
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To get the glass out I would heat up the blade of a craft knife on the cooker until it was glowing orange and then cut around the rivet. I felt is was safer than drilling, and when completed araldited the glazing to the rivet.

Yertis

18,046 posts

266 months

Thursday 2nd March 2017
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I used a small grinder on the dremel to cut the top of the rivet off, but the plastic was held fast by sticktion, so I just kept grinding away until the rivet was totally gone, then the glass just fell out. Not sure what to do with the little red light...

Yertis

18,046 posts

266 months

Friday 3rd March 2017
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Well my wife now thinks I'm mad, medical person so "That's not hot water is it yikes etc"

Yertis

18,046 posts

266 months

Friday 3rd March 2017
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The actual process was less messy than the upload would suggest.

Quick isn't it?



Edited by Yertis on Saturday 4th March 16:14

Red Firecracker

5,276 posts

227 months

Friday 3rd March 2017
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Works well, doesn't it! Inside as well, ballsy.

Wire brush in your Dremel and that'll come up a treat ready for primer. Really does pay to get it fully cleaned and brushed, I can't stress that enough, as the prep really is the key to hassle free painting.

Yertis

18,046 posts

266 months

Friday 3rd March 2017
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Foolhardy rather than ballsy - luckily it's a nice big jug biggrin

Edited by Yertis on Saturday 4th March 16:14

Evangelion

7,723 posts

178 months

Friday 3rd March 2017
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Painting is 90% preparation and 10% operation.

Red Firecracker

5,276 posts

227 months

Saturday 4th March 2017
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Yertis said:
Foolhardy rather than ballsy - luckily it's a nice big jug ??
I did warn you. :-D

Yertis

18,046 posts

266 months

Saturday 4th March 2017
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I really was amazed at how quick it is – the process appeals to my impatience. Just wire brushing now, about to primer. The decals are a looming headache.

Red Firecracker

5,276 posts

227 months

Saturday 4th March 2017
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Unfortunately nobody sells the correctly spaced decals (and I can't print cream, only white).

Yertis

18,046 posts

266 months

Saturday 4th March 2017
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Back on rather too familiar territory with this bit.



In the past I had access to a fabulously smelly system called Chromatec which used lots of banned chemicals to make custom rub downs. But that's long gone, so a bit stumped at the moment on that.

Anyway, here's where we're up to:





The first coat of primer revealed some nasty roughness on the roof, maybe because of my gung-ho approach to paint removal, so that's been sorted out so that it's nice and smooth.



Getting some red on tomorrow.

Evangelion

7,723 posts

178 months

Saturday 4th March 2017
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Looking smooth so far!

Perseverant

Original Poster:

439 posts

111 months

Sunday 5th March 2017
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Really been enjoying the articles and the pictures here. The strip down of the fire chief's car has thrown up a couple of points : once all the paint is off, you can see any casting defects and clean them off with Swiss files and so on (remember that these were mass produced toys) and now you can do the same with minor damage caused by childhood crashes, for example on bumper edges and around headlights.
I agree with the comments about replacement rivets - I have come across some "mint" toys which aren't - I always just used epoxy glue. I'm also not sure about striving for perfect paint. Yes, I use a primer and so on, and you can end up with a brilliant finish. Then I look sadly at some of the (genuine) mint models and see how the paint is a bit thin here and there and occasionally has run a bit on edges, so a bit like some restored cars they end up better than new. Mind you, with some old cars this is just as well and not difficult to achieve.
I'm currently making a Bedford breakdown crane out of a Commer crane and a Bedford truck. If anyone out there is familiar with these models, they will know what I mean - the bits are interchangeable and the early Commers had the same slots for a tipper mechanism as the Bedford, so I've always imagined that the intention was there from the start.
I'm also in a slight quandary about another notion - I have a very decrepit Commer fire engine and a ditto Bedford "S" type tractor unit by Corgi. It looks as if I could make something very like a "Green Goddess" with some surgery, Any thoughts?

CATD8H

157 posts

133 months

Sunday 5th March 2017
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We all seem to use a primer on our restorations nowadays but Dinky,Corgi etc.did not when they were new...Did they use a special paint?.

Evangelion

7,723 posts

178 months

Sunday 5th March 2017
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CATD8H said:
We all seem to use a primer on our restorations nowadays but Dinky,Corgi etc.did not when they were new...Did they use a special paint?.
I believe they used an electrostatic process whereby the parts were hung on a steel gantry which was given a positive charge, and the paint was given a negative charge.

CATD8H

157 posts

133 months

Sunday 5th March 2017
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I understand thanks for that,paint in those days seem also to have more "body/colour" to it that perhaps didn't need a primer underneath it to cover (plenty of lead in it maybe)...

The good old days..