If it don't leak no more then whats not to be happy about! LOL
Looks like they sealed the crap out of it, awesome. I have an old school rad shop here to, he hot dips the rads and tanks and it takes off the paint and rust. For tanks he media blasts the outside then brazes all the holes and keeps leak checking it until its done. When i had him do some all i had to do when i got them back was a smoothing of any repairs and a light sanding and primer and paint. Those old shop guys can do this stuff with their eyes closed.
Looks like you got it coated to, did the shop do that or you?
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1984 Honda ATC200ES "Big Red"
1982 ATC200E "Hondie"
1988 TRX300FW "Project Quad" Still in progress....