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Aluminum Painting

F

firemedic689

Well-known member
I'm preparing to paint my 11.5 ft Diamondback that is currently red. There are some scratches down to the bare aluminum , but I was wondering if it is necessary to strip all the old paint off or if I can just paint over. Appreciate any input.
 
Macco would just paint over it or add some pin stripes.

If you want it perfect then you might want to sand the whole side.
 
Firemedic if the paint has good adhesion i would not strip it just sand it properly and seal the bare spots with an etching primer designed for aluminum and youre ready to re-paint
 
P.S the best way i can tell you to test for good adhesion is to take a peice of 2 inch masking tape and put it on the paint press down well and then rip it off quickly like you were pulling a bad-aid off if the paint comes off with the tape it didn't stick very well and you will have to strip it the best method for aluminum is plastic media blsting as it will not damage or warp thr alum. hope this helps
 
i would go ahead and strip it. its to easy to do and prep it right so you have nothing to worry about.
 
Like Scooter said if paint has good adhesion no need to strip. But all surfaces to be repainted MUST BE SANDED in order for new paint to also have good adhesion. Wet and dry sandpaper works best. Just get a bucket of water and keep washing sandpaper as you go. More water the better. Depending on what type of finish you will be using around 300 grit will be OK. But if your using a high gloss finish you should us a fine grit like 600 or even finer. Basically as long as you dull the surface down a little. Flat areas are always easy to sand its the inside corners and any tight area such as around bolts that you have to pay more attention to get right in there. Or thats where she will lift and peel. Last thing I forgot to mention any chips in current paint must be feathered out if you don't want them to show. Any areas that you sand to bare metal must be primed. good luck
Swampdonkey
 
There is a product called Alumiprep that works pretty nice for preparing bare aluminum for paint.
It chemically cleans and etches the surface and then dries to a nice dull finish that the paint can get a hold on.
You just spray it on with a hand sprayer, let it sit for a few minutes, and then rinse with water and wipe it down with a clean rag.
The instructions are on the bottle. Wear rubber gloves.
 
Olf Art":2l253itw said:
There is a product called Alumiprep that works pretty nice for preparing bare aluminum for paint.
It chemically cleans and etches the surface and then dries to a nice dull finish that the paint can get a hold on.
You just spray it on with a hand sprayer, let it sit for a few minutes, and then rinse with water and wipe it down with a clean rag.
The instructions are on the bottle. Wear rubber gloves.
Click to expand...

where could you find the Alumiprep
 
At a good automotive paint supply store (not Autozone) or an on-line supplier like http://www.eastwoodco.com . Eastwood's shipping is high.
If you have a good automotive paint supply house near you they can get it for you.
 
I always use Dupont VeriPrime. It is a two part mix that we use when we paint aluminum aircraft. You can get it at any paint store. I found that Dupont makes the best paints for everything I use. If you are going to just cover a small spot then I would use a zinc chromate puff can. I would still use a good primer sealer before spraying the base coat.
 
good idea: when ur done re-painting it... you should put "Freakin' Naughty 772" on the rudders!! haha- are we ridin' on friday or what man? talk to ya lager...
 
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