Hi All:

I welded in the passenger side floor pan on my 68 RS today. It was my first real attempt at welding with my new Mig welder. Overall it came out pretty good (for a beginner).

Should I grind down all the welds or will this weaken them? My plan is to use seam sealer, Por-15 and Dynamat so I don't think the welds will be detectable under the carpet.

I think I will be ok if I leave them, but I just wanted to check with y'all first.

Thanks for the help.

Congrats! I know from experience that it is a good feeling. It won't if you don't grind off too much. Whatever you do, make sure you get all the slag off and cover it quickly so it doesn't rust.

Thanks for the reply. It really is a great feeling to actually see some progress. I will grind down all the unreasonably high spots and leave the rest. Then I will wire wheel all the slag off and get it covered up quickly.

It took a while to cut, trim and weld in the new pan but I enjoyed it! I am actually looking forward to doing the other side! (I know...I am not normal)

Thanks again.

Congrats :thumbsup: I cant wait for the day I am able to weld my floors in. I would clean them up gently as mentioned. If welded properly you wont hurt anything, plus by grinding them down you can spot any pinholes you may have from not getting full penetration. If you find this u can zap them and grind a bit to clean it up.
The only one who will notice these is you, and its your car so make sure your happy with the job.

The grinder is your friend.
I put new front floor pans and when I was sand blasting some kid must have got in my garage and drilled a bunch of pins holes in my rear floors pans?!?. hehehe
oh well I guess they can be replaced too.;)
(it's fun isn't it)

i'd grind down the tops of the welds if it we're me,, it just looks so much more professional.

Congrats on getting the floor in..

The 4 1/2" flap disks are great for this. They will level the welds while producing a lot less heat than a grinding wheel. They last a very long time too.

You should grind and clean until you can't tell you replaced it. Thats the way the pros do! I'm not normal either, since Robert gave me some pointers, I look for stuff to weld, but I stilll can't weld like the pros do. Have Fun!!!!!!!!!!

Mmmmmmmmmmm.................Welding............... ........ :D


I enjoy welding too, I also enjoy cleaning it up just as much too. Oh! and yes, the flap discs are awsome to use................007

Thanks for all the replies. I ground the welds lighty (with a flap disc, thanks to you guys).

Today I filled in some pinholes in my welds and applied some 3M seam sealer (that stuff is tough to work with).

Then I welded in the seat bracket and pan things and applied more seam sealer. I think I am getting the hang of this welding thing. I used almost two full tanks of CO2/Argon, but the trip to get more gave me a nice break.

I am hoping to get started on the driver's side pan tomorrow. Isn't vacation time great? It is so nice when work doesn't get in the way of life.

Thanks again for the help.

Which welder are you using? And what size wire?

Buy The Biggest One You Can Afford, You Will Never Regret It.htp Is An Awesom Brand

I am using a Lincoln Pro Mig 140 with 0.025 wire and Argon/CO2 gas mix. So far it works great.