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Prep for paint

A

Anonymous-0

Well-known Member
I've got an Allis WD-45 that I would like to get finished this year. I'm done with the mechanical restoration. I was going to sandblast the engine, tranny, rear end, and final drives as an assembly but I decided not to. There are some rusty places where the old paint is gone but paint is still intact on some large places. How do pros clean up old iron so they get a nice looking result that lasts for years? Here is what I was thinking about doing so if I'm wrong please correct me. Use wire wheels on a grinder to get all the loose scale and rust off and to scuff the surface of the old paint, clean the surface with lacquer thinner to remove any oil on the surface, treat with picklex to stop any rust, spray on primer sealer and epoxy primer (not sure which one first), then top coat with acrylic enamel or maybe urethane, would prefer something that doesn't require clearcoat. It's going to have to get warm before I start but I want to do it right. Thanks for the help.
 
Well.... Ya wanna do it right. Laquer thinner is not it, dries to quick to wipe up behind you. Need a wax and degreaser. Look in archives.
 
Remove all the paint, if you see rust in other places there is likely rust under the "intact" paint. Epoxy primer is a sealer, you don't need another one. If you use single stage urethane, clear is built in, although the base-clear system will give more UV protection. If you use urethane it must have hardener which requires a supplied air system to protect your lungs. Acrylic enamel can be used without hardener.
 
..What Dave said. Also , from my experience, forget the wire wheel for cast surfaces. All you do is polish the high spots and fly over the pits which leaves minute contaminants in them to haunt you later. Ask one of my customers who prepped his own cast that way for me to paint. Blast it.
 
I agree with the post that said blast it. preping is the key to a good job. blasting is a really good way to get down to bare metal. and blast it all. dont paint over paint. if your going to fire up a blaster and then a paint gun there is no need to not hit every square inch. try to atleast get the primer on fairly soon after basting. just the humidity in the air can cause that bare metal to start rusting again.
 
I have replaced all the seals on this thing and didn't want to chance getting sand in places that may cause a problem. Do they make a tape that stands up to sandblasting.
 
They make all kinds from duct tape to vinyl tape but you can't just take it to the local oil field equipment blaster with a 2" nozzle and 6 cyl diesel running 200 # pressure and expect anything but disaster. Use a blaster who has done this and cars a lot and cares about what he does and not just how fast he can do it. Or get a small one and do it yourself if you have enough air.
 
A farmer painted this WD-45 for a lady. She wanted it painted for her dad at Christmas. It was built in 1954. He power washes them then sandblast's them. Hal
85onksz.jpg
 
So disheartening to get to the age of 75 and find out you have been doing things that does not work all these years. I just spent time this after noon removing the orange paint, grease and crud build up on the rough cast head with twisted wire brushes. Now what do I do? Must have wasted my time once again.

DSC04389-vi.jpg

DSC04390-vi.jpg

DSC04391-vi.jpg
 
In your case wire brush will be the best way. It don't matter if you blast or hire it out, you will get sand (dust) in places you don't want! After its brushed clean with prep all. My 2 cents
 
(quoted from post at 16:50:16 02/15/14) So disheartening to get to the age of 75 and find out you have been doing things that does not work all these years. I just spent time this after noon removing the orange paint, grease and crud build up on the rough cast head with twisted wire brushes. Now what do I do? Must have wasted my time once again.

<img src="http://images108.fotki.com/v1623/photos/6/34676/12806977/DSC04389-vi.jpg">
<img src="http://images14.fotki.com/v1625/photos/6/34676/12806977/DSC04390-vi.jpg">
<img src="http://images9.fotki.com/v120/photos/6/34676/12806977/DSC04391-vi.jpg">
Click to expand...

Twisted wire brushes work the best for me.
 
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