[R-390] Knob Painting

[AB3L1@aol.com]

Hi Barry and all,

I just had Howard Mills do some knobs for me with the powder coat process. 
The first set I had were from my 390. Before I talked to him about doing them I 
assumed I would be able to dip them in paint stripper to get the paint off. 
The paint came off OK but the yellow primer underneath wouldn't budge. I spent a 
lot of time with steel wool getting down to the metal. Got them cleaned up 
real nice (I thought) but Howard set me straight on the coating process. If 
there is anything in the pores of the metal when doing it, there is a good chance 
that whatever is in there will expand under the baking step and cause the 
powder to lift.and break the bond. 
I figured that stripping might be good for cabinets also but the same thing 
can happen if there is any stripper in those hard to get corners or folds.
The suggestion from him was to bake the knobs in the oven for a while to burn 
the residue out. Sure enough after they cooled there was some light powder on 
the knobs. Back to the steel wool.
Set two from the 390A had no primer and the paint came off nicely with a 
glass bead blast. I had first taken a dental type tool to first scrape out the 
line channels. I did that as an extra precaution so wouldn't have to spend too 
much time hitting that area with the blaster. Maybe a bit of overkill on my part 
cuz the line paint fills in the channel anyway.

I think the glass blast is the best route to take. It provides a nice surface 
to grip and it doesn't make the finish rough looking at all.

Opinions vary.

Have fun,

Bob  AB3L


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