how do I get those clean radius corners

I am doing work on the inside of my bed and I was just wondering what to use in the corners for that nice clean radius corner look. Didnt know if I should use bondo or paintable caulk or something else in the corners......thanks

I use a piece of 6"  pipe and cut it long ways into 4 pieces and weld it in, then a piece of thin plate and cut it to fill the top rail. grind it all smooth and use a small amount of bondo or seam seal and finish with a nice rubber spray in liner.   but that is not the only way it is done.

hear are some pics of the inside the box,  wanted everthing to be smooth in the corners,  what to use?

Depends on what radius you want to use.  Do you want a large radius or a small radius?

Weld it up solid and grind the welds as smooth as possible first. I like using Evercoat metalglaze next because it is runny and sticks really well in and around the weld pores. Then top it with some nice lightweight filler to finish up all the low spots . Spray it with some highbuild DTM primer to fill in all the small grind marks and sanding scratches and you will be ready for sealer.

--------------------------------------------- Originally posted by UnusualFabrication Depends on what radius you want to use.  Do you want a large radius or a small radius? --------------------------------------------- maybe something like a 1/2" radius or something close....nothing to big

techniques said above and when time to sand, use a socket wrapped with sandpaper for the desired curvature. various sizes of sockets for a wide array of radious

If you are trying for a small radius in your filler  you can wrap sandpaper around a wood dowel of your choice and sand away. This is the easiest way that I've found to keep the radius even on long stretches like the inside of a truck bed.

--------------------------------------------- Originally posted by framedranger --------------------------------------------- Originally posted by UnusualFabrication Depends on what radius you want to use.  Do you want a large radius or a small radius? --------------------------------------------- maybe something like a 1/2" radius or something close....nothing to big --------------------------------------------- When I did mine I used a socket with a radius that didn't hit the weld in the corner.  Then go down and buy a wooden dowel thats close to that and wrap some sand paper around it and go to town.  That way I didn't have to get crazy with the grinder to dig all the weld out.  Theres hardly any filler in the corners, just enough to smooth out the welds.

with all those sharp lines in the bed it makes since to leave it with a sharp corner to me.....just my 2 cent, looks good so far bro