240Z Battery Area Advice

[Jughead]

Hi all:  Would love some opinions on how to address my battery tray area (pics below). 

 

So far I've spent about 30 minutes with sand paper and a mini (1/2") belt sander, and things are looking better.  There's some pitting, but nothing too serious from what I can tell.    Advice needed: 

 

 What's the best way to get under the tray to remove remaining rust?  What tools are folks using for this?  Once that's done, what cleaner(s) are be used once as much rust as possible is removed?  Once it's cleaned,  what should I apply to prevent future rust? POR-15?  Something else?  

 

I'd like to avoid removing the battery tray if possible/practical.

 

Thanks in advance,

 

Jughead

 

[grannyknot]

Sorry Jugs but to do the job right you need to drill  the spot welds out with a spot weld drill and remove the tray to get access to the rust underneath, otherwise it will just come back.  Grind or sand back to clean metal and apply 2k epoxy primer and then paint.

There are some good 2k primers in rattle cans now for small jobs like the battery tray area.

[rturbo 930]

1 hour ago, grannyknot said:

Sorry Jugs but to do the job right you need to drill  the spot welds out with a spot weld drill and remove the tray to get access to the rust underneath, otherwise it will just come back.  Grind or sand back to clean metal and apply 2k epoxy primer and then paint.

There are some good 2k primers in rattle cans now for small jobs like the battery tray area.

Got a brand of primer/paint you like? Gonna be needing some soon.

 

Anyway, I agree. You need to take out the battery tray. After that, I'd probably hit it with a wire wheel, apply naval jelly to the rust, and then prime/paint.

[unterbergamotten3]

One more option for you is to use a sand blaster. You can point the nozzle through the battery tray cavities. Be careful not to use a too abrasive medium. 

[bunkhouse]

 I'd treat the area with a rust converter after ridding the area of loose rust. Ospho (it will seep into the seams) is my favorite but any acid (muriatic is effective but extreme, phosphoric is better) will convert the rust. Then a zinc rich primer and on to paint.

[LLave]

Like all rust. The only REAL repair is to replace. But ospho and a good primer will slow it down a ton. 

[grannyknot]

22 hours ago, rturbo 930 said:

Got a brand of primer/paint you like? Gonna be needing some soon.

I like this suff, it says once it is mixed you have 4 days but if it is warm you get about 2 days. I have put a half a can in the fridge and it was still usable 10 days later.

6 hours ago, bunkhouse said:

 I'd treat the area with a rust converter after ridding the area of loose rust. Ospho (it will seep into the seams) is my favorite but any acid (muriatic is effective but extreme, phosphoric is better) will convert the rust. Then a zinc rich primer and on to paint.

Muriatic doesn't convert rust, it removes it, then when it is rinsed off it will flash rust so fast you can watch it. Nasty stuff, I have never found a way to neutralize it, it seems to get into the steel and continue rusting under the primer. Phosphoric acid (Ospho) is the best to use.

 

[LLave]

I have used the spay max epoxy. It works pretty well. A can doesn't go very far. Make sure you wear a real respirator. That is real 2k epoxy and would assume it contains ISOs.