Liam
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| posted on 21/12/04 at 06:16 PM |
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Calling POR15 users. Alkali degreaser question...
Hello there
Just wire brushing the loose rust off me chassis ready to POR15 it. It says to clean any oil and grease off before squirting on the metal ready, then
rinsing.
I've got a few corners that look a bit greasy so I think I ought to clean them. It says do not use solvent based cleaners. Being an idiot I
didn't get any of the Marine Clean stuff and can't get any in time.
I checked out the marine clean and it says it's an alkaline water based degreaser. I was thinking maybe I could use some diluted bleach instead
- cos bleach is alkaline right?
Anyone know if that'll work? Or maybe some normal solvent degreaser is OK? Or did you not bother cleaning - just wire brush, squirt some metal
ready and rinse?
Any help appreciated...
LIam
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James
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| posted on 21/12/04 at 06:25 PM |
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Will cellulose thinners not be ok? I though it evaporated away?
James
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Liam
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| posted on 21/12/04 at 06:33 PM |
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Dunno really - does that count as solvent based? What about meths? I cant reeeeeally see what the problem is with something that evaporates off, can
you? But then I don't want to mess up me por15 coat.
Other stuff I have is engine degreaser that needs to be rinsed, and I can't face rinsing my chassis twice - after degreasing and after metal
ready.
I think I'm convincing myself to use some meths or celly thinners in the few places that need it and be done with it. Or maybe bleach if that
works. Aaaargghhh.
Liam
[Edited on 21/12/04 by Liam]
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Rob Lane
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| posted on 21/12/04 at 07:27 PM |
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Careful with celly thinners at this time of year, as it evaporates it will pull in moisture from air which condenses on metalwork as droplets. Spoils
your anti-rust idea.
Similar to a fridge operation.
Try and do it in a warm area.
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dmottaway
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| posted on 21/12/04 at 08:23 PM |
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just use dishwashing detergent - excellent grease cutter, just means a bit of labor. and it will rinse off.
dave
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DaveFJ
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| posted on 21/12/04 at 09:06 PM |
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as far as the metal ready is concerned... as soon as you have rinsed it of get the chassis dry. You will be amazed at how quickly surface rust starts
to form! I did mine in the summer and rinsed the chassis down then left it for a half hour to dry in the sun - result an orange chassis !
Dave
"In Support of Help the Heroes" - Always
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Liam
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| posted on 21/12/04 at 09:19 PM |
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Cool
quote:
as far as the metal ready is concerned... as soon as you have rinsed it of get the chassis dry. You will be amazed at how quickly surface rust starts
to form! I did mine in the summer and rinsed the chassis down then left it for a half hour to dry in the sun - result an orange chassis !
But presumably that doesn't matter cos you're supposed to put POR15 on rust, right?
Or had I better get the paintstrippers and hairdryers out?
Cheers
liam
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krlthms
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| posted on 22/12/04 at 04:16 AM |
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Washing powder is the most widely used alkaline degreaser that is water soluble. Biodegradable too 
Happy rubbing 
KT
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Liam
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| posted on 22/12/04 at 05:36 PM |
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Aaaaaaaggggghhhhh
Well i cleaned the few greasy bits with some fairy spray and it worked OK.
Squirted the metal ready stuff on, mainly just on the smooth bits where I've been grinding or more recent tubes with only very light rust, but
it sort of went all over the place really.
Spent ages rinsing it thoroughly with water and dried it as quick as I could with some help.
It's now got a kind of white powdery residue all over it, mainly in parts that where rusty before, and not so much in the smooth parts.
Looks kind of horrible, but is this the zinc phosphate coating it says it leaves in the blurb? Is it OK to paint over it or should i try and remove
it? What did your chassis look like after prepping, anybody?
Cheers
Liam
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Matthew_1
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| posted on 22/12/04 at 10:42 PM |
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A bit of an aside, but I've just painted some bits with POR15 - make sure the garage or workshop is warm!! Painting stuff when its cold the
paint just dosn't seem to want to dry. In my garage even with an anti-frost heater the bits were still only touch dry in the morning.
Having degreased with the POR marine clean and their base coat stuff I also had a zinc type coating on the parts, when painted (with at least some
heat in the room!) the finish was superb.
[Edited on 22/12/04 by Matthew_1]
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