here's what I did to clean mine. it used to look like yours. That chrome gets beat up quick!
You'll need:
-steel wool #0000 and some of a thicker grade (about 1) I got it at Kmart
-denatured alcohol
-old toothbrush or rough cleaning pad
-paintbrush
-old rag or towel
-small can of shellac (home depot)
-armor all (wipes or spray)
-duct tape
-screwdrivers
-compressed air spray (like for the computer)
-you may choose to invest in a car chrome cleaner. I got one at Kmart for $5. It takes off rust and applies a sealant.
-dunlop guitar polish spray
-de-oxit D5 to clean out the pots and tube sockets. Got it at Guitar Center. You can order online. Get the smallest bottle or spray can.
1. remove the chassis and put the bolts aside.
Do not touch the wiring and capacitors or you may get electrocuted!!!!!
2. unscrew the tube clamps and carefully put them aside
3. with the wiring facing down on a table, put duct tape on every single hole. Don't leave any holes open!!
4. Take the denatured alcohol and dip the toothbrush in some of it. Begin scrubbing away at the rust on the transformers. It may take a while to see any results. If you're not getting much of it off, then it's time to go to #5.
5. take the 0000 steel wool and start scraping away at the rust. You will have steel debris falling all over the place, so be clean about this. You don't want that debris going into the wiring. It takes time to get everything off. If you get frustrated and don't see much results, then go to the thicker steel wool. The only trap you can fall into is if you rub so much you strip the factory epoxy clean off the metal. My transformers had so much rust that I had to end up stripping all the epoxy off, leaving me with bare metal.
Should you end up doing this (which isn't necessary), go to 5A
5A. After stripping the epoxy, apply several coats of shellac to protect the transformers from rusting. Shellac is actually used inside of transformers, so don't worry about it damaging the transformer or overheating. I have yet to do this step on my amps, so it's up to your judgment to know how many coats to put on. I don't think you need to dilute it though.
6. Take the 0000 steel wool and very gently scrape the chrome. If you get results, gently go about repeating this all over the top. You can then apply the chrome cleaner and sealant. The problem with using the sealant first is that it will lock in a layer of film that will look ugly. So use the fine steel wool first, then put the sealant.
7. CAUTION! Do NOT scrape the black lettering on the amp! It will fall off immediately, even with a gentle scrape of the 0000 steel wool. Be very careful when you go about removing the rust on the front and back of the amp where all the knobs are located, or you will strip away the logo and lettering. Resale value will drop bigtime!!
8. Apply armor all liberally to the leather shell to get it clean and shiny. Clean the inside of the shell with an old rag or something. No need to use chemicals.
9. Clean the area of the steel wool debris and then remove the duct tape. Clean any dust or steel wool debris that may have snuck inside the chassis (especially around the transformer's edges). A magnet works well here (tip of a screwdriver for example). Use your can of air spray to clean out the inside.
10. Apply the caig de-oxit spray to the pots and tube sockets. Do not overspray because it doesn't evaporate too well.
11. Re-attach the chassis to the shell. Use a rag to wipe the black tread plate with dunlop guitar polish spray. You can use this in small amounts on the chrome as well. Gently wipe off fingerprints and what not. Clean off anything else you missed, and wahla! A brand new looking amp.
Here are pics of my before and after: