stew

sorry mods if its in the wrong place but i need an answer before i top my self

help please from all the resto people. i am in the middle of a full restoration of my car and while i have been trying to paint the under side every so often a patch appears of what looks like an oily surface..i have tried using petrol to clean area but to no avail.please help with offers of what i can do.

stew

anybody any ideas.this is by far the best place to ask with the number of people who restore,concours cars.

Niall.b

what u got i think is sections of steel inpregnated with oil over the years. steel is porous & will hold old oil in it rather like a sponge. u need to clean these areas thoroughly with a degreaser & let dry. will probably take a few attempts to shift it depebding on the age of the car. hope this helps

stew

thanks for the help.

i dont know if this is a contributing factor but the under side is coated in what looks like gritty black undersel which is sticky which suggests it was done not so long ago how can i get rid of this

Niall.b

mates dad has been doing the same work on the underside of a mk 2 escort. used a small blow torch (taymar type ) & a chisel & scraped the lot off. takes ages. dont use too much heat to redden metal, just enough to melt the black crap & make it easier to scrape off. what sort of motor is it? & what age?

stew

its a j reg nissan pulsar gtir and it has been took back to bare shell.its had a colour change full quaife box built for it etc and is getting fully rebuilt engine,diffs etc

the under side is the only place i was going to leave but now decided i might as well do it seeing as the rest of the car will be factory fresh.

i remember seeing the blck gritty stuff somewhere before.looed like a cheap version of waxoyl.

Niall.b

sounds like stuff we used to use called tetroysyl, was a gritty crap u brushed on after repairs. not worth the full of yer arse with roasted snow. a little heat should shift it

Lee Reynolds

u need to remove all the underseal from everywhere. Clean the underside so u can eat ur dinner off it. Then before you paint you need to wipe it down a few times with pre paint(panel wipe).

NUTS RuS

iTrader: (35)

Acetone always worked for me

aRSe

Sounds spot on to me. If you look at the underside, and think to yourself, "is it clean enough", it probably isn't! There will be oil/grease residue in the panel seams, it will take ages to clean it all sufficiently, but the end results will mirror the effort put in, so DON'T cut corners!

stew

you have all been a great help thank you.

and tetrosyl is almost certainly what it was called when i saw it.