mrbig
Part of things
Semi-professional Procrastinator
Posts: 461
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Sept 24, 2021 18:07:21 GMT
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So finally gaining some momentum on my beetle build and trying to ge the chassis rolling. The front spindles/stub axles need a lick of paint, I’m not building a show car but I do intend to keep it vaguely clean and tidy underneath.
The spindles are cast and I’ve not had much luck with painting that sort of thing before so I’m looking for some advice on the best process please?
A buddy of mine has blasted them for me today but they have a sort of brown coating on them now (see pictures) so I’m not sure what to do. Can I wire brush them and use grey etch primer and chassis black over the top? Should I get them dry blasted somewhere else to make sure they are clean and then use some POR15 or similar?
Everything I’ve tried to paint my entire life has gone to curse word. Got my life savings in this car so don’t want to eff it up! Any advice very gratefully received.
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1969 German Look Beetle - in progress
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mrbig
Part of things
Semi-professional Procrastinator
Posts: 461
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Sept 24, 2021 18:08:36 GMT
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Last Edit: Sept 24, 2021 18:09:12 GMT by mrbig
1969 German Look Beetle - in progress
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stealthstylz
Club Retro Rides Member
Posts: 14,833
Club RR Member Number: 174
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Sept 24, 2021 18:16:11 GMT
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I'd just paint them as they are. Wire brushing cast always seems to polish the surface and the paint doesn't stick properly.
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Sept 24, 2021 18:17:27 GMT
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Knot wheel in a grinder and take it back to cast, if you want panel smooth you'll need to give plenty of time and effort to sanding and filling it before paint. If you're happy with the metal finish as is then etch prime or epoxy prime then paint over that and be done with it.
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Sept 24, 2021 18:25:37 GMT
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Looks like they have been wet blasted maybe?
You can use etch primer or treat them with phosphoric acid (that's what's in etch primer)
Then go with your paint of choice.
You will never really make stuff like that stay mint for ever but as long as you get some phosphoric on there you will be giving it the best chance.
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mrbig
Part of things
Semi-professional Procrastinator
Posts: 461
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Sept 24, 2021 20:48:36 GMT
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I’m happy with the finish as it is, I just want to try and hold off the surface corrosion for as long as possible.
Looks like I will be just etch priming them as is and then paint. Thank you all, much appreciated.
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1969 German Look Beetle - in progress
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jgtr
Part of things
Posts: 270 
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Sept 25, 2021 7:19:53 GMT
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Epoxy primer all day. Goes over bare clean metal and is water proof. Surface needs to have a key so use wire brush or sandpaper, wire wheel can leave it ‘polished’ and the paint may not stick.
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Sept 25, 2021 8:43:33 GMT
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Got to admit I've never had an issue with either etch or epoxy not sticking to wire wheeled metal, they are after all designed to chemically bond to the substrate.
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jgtr
Part of things
Posts: 270
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Sept 25, 2021 9:24:06 GMT
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Got to admit I've never had an issue with either etch or epoxy not sticking to wire wheeled metal, they are after all designed to chemically bond to the substrate. My understanding is that epoxy is a mechanical bond, the TDS for the stuff I use (Lechler) stipulates sanding with appropriate grade of abrasive. There was a post on here where a guy was stripping some epoxy, the bits he had wire wheeled came off really easy whereas the other areas had a much better bond. |
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Last Edit: Sept 25, 2021 9:24:33 GMT by jgtr
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