B
Burton
Guest
Up till now I have only done some old or already painted tanks and I was wondering if I get some new metal from a thrid party or dealer should I do anything to the metal before primering?
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K
kustom paint workz
Guest
if it is bare steel it will probably come with an oily slime on it. I use a combination of lacquer thinner and carb cleaner to remove this. if it comes primed with a good primer just scuff and shoot. make sure that it is a good primer. And remember just because it's new sheet metal doesn't mean it's perfect go over it very carefully. their maybe dents that you wont notice by taking a quick look.
I don't like the metal preps because at times they rust when you're done neutralizing them.I do use a product called Ospho (Phospho is the same) but it's mainly a rust converter.On bare steel I just degrease it and sand it with 180 on a DA.A spot or 2 of light surface rust will sand off but if it's heavier I'll sandblast or Ospho the spot.The Ospho has to sit for 24hrs so I prefer sandblasting.Sometimes I use an etch primer but most of the time I epoxy prime it with DP40 with the 401 hardner(PPG).This stuff sticks to almost anything and about anything will stick to it.
M
mendikant
Guest
I had a couple of fuel tanks and fenders sand blasted
several months ago and didn't have a chance to get
primer on them. Now there's, naturally, some surface rust.
What's the best way to get rid of this?
I've used KleanStrip rust remover before on a
set of pipes with mixed results; it left a residue
that was hard to get rid of and made me real leery of painting
over it. Is sandpaper(and what grit?) the way to go?
Steel wool(seems to make the metal unduly shiny, no?)?
TIA,
Mendikant
several months ago and didn't have a chance to get
primer on them. Now there's, naturally, some surface rust.
What's the best way to get rid of this?
I've used KleanStrip rust remover before on a
set of pipes with mixed results; it left a residue
that was hard to get rid of and made me real leery of painting
over it. Is sandpaper(and what grit?) the way to go?
Steel wool(seems to make the metal unduly shiny, no?)?
TIA,
Mendikant
You have a few options.One is ose the metalpreps and scrub the rust off,which I don't like.Another is have it beadblasted or lightly sandblasted with fine sand.I get leary of multiple blastings because it chews away at the brass at the fittings on the tank pretty quick.I think what I'd do is run a wire brush over it on a diegrinder and do the tight spots by hand to knock off the loose rust and then Ospho (Phospho is the same) it.When it's dry the next day DP epoxy prime it (PPG).
J
Jeremy Farny
Guest
mendikant, use 320 wet sand paper and then use etching primer
I'd be real leary of wetsanding it.It will pull some of the rust off but you'll have to sand the metal down to the bottom of the blasting pits to guarrantee all the rust is gone and theres probably spots around welds you can't get to.If you don't remove every spec it'll continue to rust no matter what.I forgot to mention the stripper.To neutralize it flush it really good with the water hose and scrub it with a red Scotchbrite while flushing.Dry it off with a towel and shoot some good etch primer on it.I like to DA the metal with 180 or 240 right after drying but it's optional.If you don't sand it there might be a slight orange tinge to the metal from it starting to rust but the etch primer will hold this back,it's not the same as the rust you have now that's in an advanced stage.